Positioning Depression as a Critical Factor in Creating a Toxic Workplace Environment for Diminishing Worker Productivity

This study determined how a toxic workplace environment can influence worker productivity, directly and indirectly, using work depression as a mediating variable. A toxic workplace environment with multiple dimensions (harassment, bullying, ostracism, and incivility) was used in this study. We used a questionnaire survey approach to evaluate the data. A total of 53 items were used in the questionnaire with a five-point Likert scale. The data were collected from 23 branches of five Chinese banks in the vicinity of Shanghai. The authors distributed 250 questionnaires among targeted employees (senior managers, middle managers, and administrative staff) and received 186 filled questionnaires, among which six were incomplete. Thus, the completed sample size of the research was 180, and the overall response rate was 72%. To estimate the proposed relationships in the research model, we used partial least-squares structural equation modeling (PLS-SEM 3.2). The outcomes of this study indicate that for direct and indirect relationships, a toxic workplace environment negatively influences worker productivity. Moreover, the outcomes of this study also show that work depression negatively impacts worker productivity. The study concludes with a discussion, limitations, and future research directions.


Introduction
The effects of a toxic workplace environment on employee productivity are discussed in the literature [1][2][3]. However, insights into the depression it creates among organizational personnel are still lacking in the academic body of knowledge. This study puts forth an effort to fortify the mediating effect of work depression between a toxic workplace environment and worker productivity to determine implications for academicians and practitioners. Past studies exemplified that most organizations show concern about measuring "profit" to calculate their productivity [4][5][6]. However, depression and harmful workplace determinants leading to employee turnover are other vital indicators for computing organizational productivity. Employees are the most significant asset for any organization, but, in many sectors, they are ignored in the computation of productivity [7]. The literature categorizes employees as "star" (incremental) or "spark" (toxic) [8] because they are direct sources of incremental organizational outcomes, while "toxic" workers drive organizations to unproductive circumstances. Prior studies also indicated that most of the working issues are directly related to worker productivity or work performance. The workplace environment is especially involved when employees are assigned issues such as work strain and counterproductive work behavior (CWB), eventually leading to the loss of organizational efficiency and repute [27].

Workplace Harassment
Von Gruenigen and Karlan [21] argued that an individual's dignity is ruined by deviant or unwanted behavior. Humiliation and terrorization of one individual by another at the workplace is called workplace harassment [28]. Therefore, sexual intimations, pornographic jokes, images, and taunts, and nude mockery at the workplace related to sex, beliefs, race, religion, genes, origin, color, ethnicity, or age are all part of a toxic workplace environment [29,30]. The concept of workplace harassment was considered in 1978 [31], and is a trendy topic in the recent era that is gaining consideration and attention by researchers due to its significance. Research and investigations have been done at a very limited level in Asian countries because Asian people do not want to talk about this topic, considering it as "taboo" relative to workplace or domestic matters, and that it even has disgrace for victims too [32]. Very few people are willing to talk or communicate about harassment, specifically in the Chinese working context. Most research conducted on the topic of workplace harassment is with women at an alarming ratio. Unfortunately, the topic of workplace harassment in men does not get much attention [33]. Men and women of every age and at any stage experience workplace harassment. Feminist scholars relate this concept with bourgeois or male-dominated society, in which women have to face gender discrimination, male stereotypes, job threats, and a paradoxical power threat, which leads to low literacy for women due to the male-dominated society [34]. Workplace harassment is deep-rooted and has traumatic effects on the emotional well-being of an entire workplace [35]. Workplace harassment lowers employee morale, which directly affects organizational productivity [36].

Workplace Bullying
Mushtaq, Sultana [37] suggested that workplace bullying causes disastrous mental trauma for any individual or employee. Abusive blaming, humiliation, social isolation, bullying, criticism, and sarcastic mockery by an employee or employer is marked as workplace bullying [38,39]. Bullying rises in different situations with different styles and is not restricted to the workplace [40][41][42]. It can be seen as deeply rooted in organizational culture and climate, negatively affecting the well-being of employees, causing mental sickness, and job burnout [43]. Bullying can be organizational or individual. Individual bullying is related to disputes and can be described as wrong guy/good guy, escalated, delegated, complex, merry-go-round, bystander, subordinate, personality disorder, or gang bullying. Organizational bullying includes organizational cultural bullying, bully processing, and senior team bullying (from senior peers' tactics) [44,45]. Leymann [46] introduced the concept of organizational bullying, which has been adopted in different sectors and countries with different styles [44,47,48]. A toxic workplace environment and bullying create and accelerate work depression, stress, low levels of work engagement, a high ratio of absenteeism, a lack of work performance, and work destruction [49].

Workplace Ostracism
Workplace ostracism is described as workplace isolation that is perceived by an employee due to his/her peers or employers [50][51][52], with negative consequences for and by the employee toward organizational development in the form of high turnover, lack of work involvement, and high job dissatisfaction [9]. Previous studies have presented findings showing that workplace ostracism has an embedded impact on the psychological and physical well-being of employees, and this traumatic experience results in hostility, stress, and adversarial outcomes [53,54]. Therefore, workplace ostracism produces counterproductive work behavior [54,55], negative work behavior, depressive behavior, and emotional exhaustion [56]. In critical situations, an employee may start to avoid doing tasks and hold back due to the stress of ostracism. Workplace ostracism lessens motivation among employees, and both employees and the workplace have to suffer in the form of lower efficiency. In the literature, there are also reports showing that-with a specific or abusive purpose-an employee or employer can be troubled or saddened by the workplace's norms with his/her intentions of generating stressful situations for personal gain [57][58][59]. Nonverbal abuse or verbal actions and disrespectful/hostile behavior toward peers are also part of incivility at the workplace [38,60]. Educators, management scientists, health care practitioners, and researchers have focused on eliminating the foundational roots of nonproductive employees, such as when they have to sacrifice their self-esteem, level of satisfaction, degree of respect, and productivity. Moreover, a business entity has to face socially harmful, depressive, and isolated circumstances with a lower level of development [30]. This type of deviancy and modest intensity prompt employees to undermine performance and create a bad image of the workplace among their peers [61,62].

Work Depression
Depression is also considered a taboo subject in the workplace. Many people face workplace depression. Most employees do not reveal their depression because of the fear of discrimination and stigmatization among their peers. However, most employees face workplace discrimination and negative reactions from employers and coworkers due to depression and anxiety. Workplace depression is a mental illness associated with disadvantages due to a toxic workplace environment [23]. Employees spend approximately 90,000 h at work throughout their working life [63]. An employee's poor mental health can be caused by internal and external factors at the workplace as well as ineffective management, which has a toxic and severe impact on productivity, career prospects, and, more broadly, organizational development [64]. Workplace depression is considered a stigma, and most employees who suffer mental illness face additional challenges; they conceal their mental status at the workplace because people have a lack of awareness about workplace depression. Presentism is also considered part of workplace depression, which is another loss of employee productivity when the employee comes to work, but the level of function is very low or there is low involvement (mentally absent). Turnover costs come when employees leave the workplace due to workplace depression and other employees replace them, and the organization has to bear the employment cost [65].

Worker Productivity
Cocker, Martin [66] reported that work productivity indicates the measurement of employee effort, and that work engagement, efficiency, accuracy, and effectiveness indicate the input of human resources into productive output. Therefore, to spend time for the desired outcome, it is expected that employees will expend effort and have high work engagement by using limited resources, and this is known as work productivity [67]. Previous researchers suggested in their studies that productivity does not have a single operational definition, but it varies according to multifaceted situations and the types of organizations and their cultures [39,68,69]. Worker productivity is integrated with organizational productivity and employee work performance, which determines the quality of work [70]. The productivity of a job is connected to multiple factors, such as working environment, supportive supervision, individual abilities, and an integrated motivational set of policies and organizational standard operational procedures (SOPs). It can be measured in monetary terms, by which organizational attributes (social, human, financial, and organizational capital) can measure and monitor worker productivity [71,72]. The work environment also plays a vital role in producing and raising worker productivity in line with the employee's ability and social network. Employees who are satisfied with their work environment will be more productive and engaged with their work. Thus, business entities should focus on generating a workplace conducive to the well-being of the organization and the workforce as a priority [73].

Toxic Workplace Environment and Worker Productivity
Organizations are designed to organize and arrange the workforce according to their social nature for better output within groups as the toxic workplace environment causes panic and is unpleasant. This is significant for the workplace, where the frequency of a diverse workforce and teamwork is increased and the business entity is in dire need of charismatic leadership to communicate between employees, colleagues, and stakeholders [74]. The above-mentioned arguments described that a toxic workplace environment creates lower levels of satisfaction, negative organizational commitment, and high degrees of anxiety, depression, and turnover [27].
Furthermore, by deteriorating psychological well-being and job-related attitudes, a toxic workplace environment plays a vital role in undermining worker productivity. First, the toxic workplace environment threatens employees' necessities and their psychological resources [17]. Limited psychological resources are critical for employee growth, and to redeem or recapture such resources, the employee has to spend time, effort, and energy managing interpersonal problems and family conflicts to achieve the core job tasks to upgrade work productivity [75]. Second, toxic workplace environments and workplace ostracism cut employee targets and social unity with organizational peers [76]. In this critical situation, employees cannot get access to work-related information and resources because they are cut off from social ties, which ultimately results in low worker and organizational productivity [77]. Ferris et al. (2008) conducted an empirical study on the relationship between workplace ostracism and job performance, and found that a toxic workplace environment has a negative relationship with worker productivity [78]. Some previous studies pointed out that a toxic workplace environment has a negative relationship with worker productivity [79,80]. These findings generate significant understanding of the connection between a toxic workplace environment and work productivity. Thus, the negative relationship of a toxic workplace environment with work productivity is depicted in the following hypotheses ( Figure 1): Hypothesis 1a. Work harassment negatively influences worker productivity.

Mediating Effect of Work Depression
A toxic workplace environment creates work depression among employees and negatively affects the overall performance of the organization. Similarly, work depression plays a significantly negative role in mental illness in organizations worldwide. Also, a toxic workplace environment, including inductive and depressive working environments, affect employees' decision-making power and work synergy [81], which will be disadvantageous to the organization due to low production, high absenteeism, high turnover, and excessive economic costs [82]. Employee quality of life suffers from the toxic and depressive workplace environment [83]. Work depression pushes employees at high risk of stress and anxiety rather than other occupational employees [13]. Prior studies found that 65.3% of Chinese workers experienced depression [44,84]. Frank and Dingle demonstrated that severe workplace depression leads to suicide attempts [9]. A toxic and depressive workplace environment not only reduces the performance and productivity of employees and organizations, but also causes lower professional behavior of employees [85].
According to the study of Warr [86], employees who suffer from a high level of work-related depression are also vulnerable to mental sickness and react with aggression, anxiety, isolation, low morale/confidence, and the feeling of self-denial. Work-related depression is a contributive mediator of the association between the toxic workplace environment and employee productivity. In line with the model from Spector and Fox including Affective events theory (AET), internal status including mental status is the territory of employee assessments, which they get from the workplace environment, resulting in the influential behavior with a range of worker performance and behavior [87]. Hence, according to the above discussion, this study indicates that work depression plays a mediating role in the relationship between the toxic workplace environment and worker productivity. Thus, taking the above arguments together, we propose the following hypotheses ( Figure 1): Hypothesis 2a. Work depression mediates between toxic workplace harassment and worker productivity.
Hypothesis 2b. Work depression mediates between toxic workplace bullying and worker productivity.
Hypothesis 2c. Work depression mediates between toxic workplace ostracism and worker productivity.
Hypothesis 2d. Work depression mediates between toxic workplace incivility and worker productivity.

Research Approach
The questionnaire survey approach takes into account a real investigation of circumstances that supplements the quantitative approach [88,89]. The quantitative method typically begins with designing a questionnaire and collecting data based on a hypothesis, and it is followed by applying descriptive or inferential statistics [90]. Therefore, according to Hartley [91], surveying is a research technique that allows the collection of data directly from persons involved in the research through a set of questions organized in a particular order. It is one of the most frequently used quantitative techniques since it allows obtaining information about a given phenomenon by formulating questions that reflect the opinions, perceptions, and behaviors of a group of individuals. Quantitative surveys offer several benefits, and in this study, this method was selected due to the high representativeness of the entire population and the low cost of the technique when compared to other

Research Approach
The questionnaire survey approach takes into account a real investigation of circumstances that supplements the quantitative approach [88,89]. The quantitative method typically begins with designing a questionnaire and collecting data based on a hypothesis, and it is followed by applying descriptive or inferential statistics [90]. Therefore, according to Hartley [91], surveying is a research technique that allows the collection of data directly from persons involved in the research through a set of questions organized in a particular order. It is one of the most frequently used quantitative techniques since it allows obtaining information about a given phenomenon by formulating questions that reflect the opinions, perceptions, and behaviors of a group of individuals. Quantitative surveys offer several benefits, and in this study, this method was selected due to the high representativeness of the entire population and the low cost of the technique when compared to other alternatives. On the other hand, the reliability of survey data is dependent on the survey structure and the accuracy of the answers provided by the respondents [92,93].

Instrument Development
The purpose of this study was to determine how a toxic workplace environment (harassment, bullying, ostracism, and incivility) directly and indirectly influences worker productivity, using work depression as a mediating variable. All the items of the toxic workplace environment and worker productivity were adopted by Anjum et al. [44], which were adapted and modified from prior studies [94][95][96][97][98]. The items of the mediating variable, work depression, have been adopted and modified from Kroenke et al. [99]. A total of 53 items were used in the questionnaire with a 5-point Likert scale (ranging from 1, "strongly disagree," to 5, "strongly agree"). Then, a pilot study was conducted to check the reliability and validity of the instrument. The respondents of the pilot study recommended some changes. Thus, the instrument was revised according to feedback from the respondents. The revised instrument was disseminated among the selected population for data collection.

Sampling and Data Collocation
Data were collected from 23 branches of 5 banks of China in the vicinity of Shanghai. Due to data confidentiality, we renamed the selected banks as Bank A, B, C, D, and E. We focused on the banking sector for 2 reasons: first, to concisely interpret the views of banking executives, and second, because of the importance of the toxic workplace environment and work depression which affect work productivity in the banking sector. The data were collected from banking personnel (senior managers, middle managers, and administrative staff) as we believe that all concerned banking employees were aware of the topic of the research. The authors provided necessary explanations about the aim of survey analysis and the related definitions of the constructs used. The respondents were also addressed with the research objects at the start of the questionnaire. A purposive sampling technique with the questionnaire survey was followed to collect data from staff members. The goals of the study were introduced to all respondents at the start of the questionnaire in the guidelines. Moreover, according to the ethical rules of research, respondents were told that the information they provided would not be revealed to anyone and would be used for research purposes only. At the time of designing the questionnaire, a pilot study was conducted. There were 20 pilot study respondents who were aware of the topic of this study. Nunnally and Bernstein recommended that the ideal value of Cronbach's alpha for data reliability is 0.7 or higher [100]. Thus, outcomes show that the overall Cronbach's alpha of this study is according to the suggested standard value. The results indicate that all scales are acceptable. Hence, the measures used in this study were considered highly reliable.
The workplace harassment items were adopted from Kamal et al. [94]. A total of 10 items were used for work harassment with a 5-point Likert scale (ranging from 1, "strongly disagree," to 5, "strongly agree"). Sample items included "My supervisor/co-worker/subordinate tried to touch my hands while giving me something," and "My supervisor/co-worker/subordinate often shares some dirty jokes with me." The ideal Cronbach's alpha value for data reliability is 0.7 or higher, which is considered adequate [101,102]. Our results show that the Cronbach's alpha value is 0.805 for work harassment. The results indicate that the value of workplace harassment is greater than the standard value. Hence, the measures used in this study were considered highly reliable. The workplace bullying items were adopted from Carteret et al. [95]. To measure work bullying, 8 items were used with a 5-point Likert scale (ranging from 1, "strongly disagree," to 5, "strongly agree"). Sample items included "My supervisor/co-worker/subordinate ignores me or gives me a hostile reaction when I approach," and "My supervisor/co-worker/subordinate spreads gossip and rumors about me." Our results show that the Cronbach's alpha value is 0.717 for workplace bullying, which is higher than 0.70. The results indicate that the scale is acceptable. Therefore, the measures used in this study were considered adequate.
Workplace ostracism used 9 items developed by Lindenberg [96]. All items were measured with a 5-point Likert scale (ranging from 1, "strongly disagree," to 5, "strongly agree"). Sample items included "I noticed my supervisor/co-worker/subordinate would not look at me during work," and "My supervisor/co-worker/subordinate refused to talk to me at work." The Cronbach's alpha was 0.783 for work ostracism. Hence, the measures used in this paper were considered highly reliable.
Workplace incivility used 9 items developed by Handoyo et al. [97]. All items were measured on a 5-point Likert scale (ranging from 1, "strongly disagree," to 5, "strongly agree"). Sample items included "I often talk to someone who can help me with the situation," and "I took my anxiety out on other people." The Cronbach's alpha was 0.810 for workplace incivility. The results indicate that the scale is acceptable. Hence, the measures used in this study were considered adequate.
Workplace depression used 7 items developed by Kroenke et al. [99]. All items were measured on a 5-point Likert scale (ranging from 1, "strongly disagree," to 5, "strongly agree"). Sample items included "I have little interest or pleasure in doing things," and "I feel tired or have little energy." The Cronbach's alpha was 0.766 for workplace depression, which is higher than 0.7. Thus, the measures used in this research were highly reliable.
Worker productivity was measured by 9 items adopted from Beck et al. [98]. However, the items of work productivity were modified according to the needs of the research. Therefore, work productivity was calculated by averaging the items to ensure that higher scale values would represent higher levels of productivity. Sample items included "During the past six months, often I could not complete my work because of my health problems," and "I don't sleep well, which affects my work productivity." Our results show that Cronbach's alpha value is 0.791 for workplace bullying. Hence, the results indicate that the measures used in this study were considered highly reliable.

Demographics
The authors distributed 250 questionnaires among the targeted employees and received 186 filled questionnaires, among which 6 were incomplete. Thus, the completed sample size of the research was 180 and the overall response rate was 72%. The majority of respondents were men; women made up just 25% of the total respondents. In this sample, the working experience of respondents was as follows: 25.5% had less than 5 years of working experience, 43.9% had 5-10 years of working experience, and 30.5% had more than 10 years of working experience; 11.1% of respondents were senior managers, 30.5% were middle managers, and 58.3% were administrative staff. Also, 6.1% were under 25

Analysis and Results
The partial least-squares structural equation modeling (PLS-SEM 3.2) approach was used to analyze the relationships drawn in the theoretical framework [103]. The reason for selecting variance-based structural equation modeling (SmartPLS) was its comparatively lower sensitivity to sample size as compared to covariance-based SEM approaches like AMOS (analysis of moment structures) [104]. First, we examined the reliability and validity of the scales used [105]. Table 2 presents the statistics for the reliability and validity of all constructs used. The reliability measures (Cronbach's alpha, rho A) for all constructs were found to be greater than the proposed benchmark value of 0.7 [106]. Similarly, Table 2 shows that the average variance extracted (AVE) value for each construct is greater than or equal to 0.50 [107], which indicates that the data used for this study are valid and reliable. Also, to check the reliability of constructs used and their specified convergent validity, it is believed that the condition of discriminant validity must be achieved [107]. For this purpose, the square root of the AVE for each construct should be higher than the shared variance among constructs. Table 3 shows the diagonal values in bold as higher than the inter-construct correlation values. The discriminant validity is recognized.

Hypothesis Testing
Hypothesis testing was done through a bootstrapping mechanism in Smart PLS. [103]. Table 4 shows the direct effects discussed in the theoretical framework along with t-values and p-values.
The results indicate that workplace harassment negatively influences worker productivity (β = 0.824; p < 0.000), which supports hypothesis H1a. This means that if harassment increases in the organization, then worker productivity will decrease. Workplace bullying, as an independent variable, also negatively influences worker productivity (β = 0.624; p < 0.000), which is supported by hypothesis H1b. This means that if workplace bullying increases, then worker productivity will decrease. There is also a negative influence of ostracism on worker productivity (β = 0.723; p < 0.000), which supports hypothesis H1c. Thus, it has been proven that worker productivity will decrease if workplace ostracism increases. Furthermore, it was found that incivility negatively influences worker productivity (β = 0.447; p < 0.000), thus H1d is also accepted. Findings of this hypothesis indicate that more incivility results in lower worker productivity. Table 4 highlights detailed information about the direct effect of a toxic workplace environment on worker productivity.

Mediated Effects
To inspect the mediating effects of work depression between a toxic workplace environment and worker productivity, we used the Smart PLS-SEM (Partial least square structure equation modelling) data analysis technique. Table 5 presents the indirect effects of work depression on worker productivity. In hypothesis H2a, we test the mediating relationship of work depression between harassment and worker productivity. The outcomes indicate the presence of the effects of harassment on work depression (β = 0.272; p < 0.000) and worker productivity (β = 0.112; p < 0.000), and work depression on worker productivity (β = 0.095; p < 0.000). Similarly, in hypothesis H2b, we test the mediating relationship of work depression between bullying and worker productivity. The outcomes indicate effects of bullying on work depression (β = 0.423; p < 0.000) and worker productivity (β = 0.162; p < 0.000), and work depression on worker productivity (β = 0.102; p < 0.000). The results of hypothesis H2c indicate that work depression mediates between ostracism and worker productivity. The values are as follows: effects of ostracism on work depression (β = 0.423; p < 0.000) and worker productivity (β = 0.149; p < 0.000), and work depression on worker productivity (β = 0.98; p < 0.000). Similarly, hypothesis H2d also supports our study. The results show that work depression mediates between incivility and worker productivity, indicating the mediating relationship of incivility on work depression (β = 0.587; p < 0.000) and worker productivity (β = 0.54; p < 0.000), and work depression on worker productivity (β = 0.42; p < 0.000). Hence, the indirect hypotheses H2a, H2b, H2c, and H2d were also accepted. Moreover, Table 5 shows detailed information (estimated, standard error, and composite reliability values) of the mediating effects of work depression between a toxic workplace environment (harassment, bullying, incivility, and ostracism) and worker productivity.

Discussion
With the impetus to find the direct effects of a toxic workplace environment (harassment, bullying, incivility, and ostracism) on worker productivity and the intervening influence of work depression, this research effort provides insightful results based on the synthesized model framework. To the best of the authors' knowledge, this is among the earliest research paradigms to investigate the impact of a toxic workplace environment on worker productivity in the Chinese organizational context, especially by considering work depression as a mediating construct.
First, we focused on the direct relationship of a toxic workplace environment (harassment, bullying, incivility, and ostracism) on worker productivity. The results show that a toxic workplace environment has a negative relationship with worker productivity, which supports our intuition drafted in hypotheses H1a-d of the study. Prior studies showed that a toxic workplace environment has a negative relationship with worker productivity [32,40,108,109]. Similarly, Wu and Hui examined 208 workers employed at two Chinese companies (petroleum and gas companies), and the outcomes of their study indicated that a toxic workplace environment is directly negatively connected with worker productivity [110]. However, in the banking industry, most of the workers' tasks are operational, and the working culture of banks is very modern and customer oriented. Operational activities are different than project jobs, in which workers are under more pressure to complete their tasks within a limited time. Due to such high demand and limited time, a natural toxic environment can arise, which can ultimately diminish worker productivity.
Second, this study depicts work depression as mediating between a toxic workplace environment (harassment, bullying, incivility, and ostracism) and worker productivity. The mediating effect also produces significant results, which is a novel and original contribution in the context of emerging or developing countries like China. The mediating results support the findings of past literature and hypothesis H2d [84,86]. Liu and Chang argued that due to work depression, workers cannot sleep well and they have headaches, and these health problems decrease their productivity [110]. Devonish examined the operations of five wholesale and large-sized retail organizations in the small developing nation of Barbados located in the English-speaking Caribbean region, and the outcomes of his study indicate that work-related depression mediates the relationship between a toxic workplace environment and worker task productivity [48]. The findings of these studies support our study. Thus, work depression mediates in the relationship between a toxic workplace environment and worker productivity. In the banking sector, banking professionals are required to cope with numerous demands: skills demanded for the job (such as the ability to understand, alter, lead, and control the behavior of individuals and groups), technical demands (such as customer service skills, teamwork, learning new technological skills, effective communication), and administrative demands (such as the need to address financial considerations when dealing with customers). These demands could naturally result in numerous pressure situations for banking personnel. Furthermore, high job demands and work pressures affect workers' health, resulting in conditions such as headaches, insomnia, social dysfunction, and depression.

Practical Implications
The results point out several practical implications for managers that could reduce the toxicity of workplaces. First, an optimum work environment, where the bank's leadership should consider workers as the key pillar of the organization, would be imperative for overall productivity. Second, a sense of ownership should be realized in the workers' minds, which would help to diminish depression, ultimately leading to productive outcomes. Third, human resource departments should introduce strict policies against workplace harassment, bullying, incivility, and ostracism. Moreover, human resource departments should conduct training needs assessments (TNAs) at the organizational level, and where they find a high level of toxicity, they should organize training on workplace harassment, bullying, incivility, and ostracism. Finally, managers should encourage a positive work environment and culture to foster teamwork, friendliness, and interpersonal cooperation among workers. For example, organizations should organize some sports and family fairs for workers. These steps can help to reduce the toxic workplace environment, which will reduce headaches, insomnia, social dysfunction, and depression among workers.

Limitations and Future Research
The findings of this study provide empirical insights into the banking sector of China. Based on these findings, the results may not be generalized, as the authors believe that there are certain limitations. (1) the sample size of this study is limited. (2) Due to the selection of data collection, genders are not evenly distributed. The banks targeted for data selection had more male than female personnel. The authors believe that with just drafted limitations, the results cannot be generalized and readers should consider these limitations before recognizing the analyzed results. Future research efforts could increase the sample size and target evenly distributed respondents from the perspective of gender. (3) This research was purely based on respondents' views about workplace depression, ignoring demographic specifications such as gender, age, education, race, etc. Since this was a first-time effort on such a sample for particular research variables, future research would be needed to highlight gender (female-specific) depression issues. (4) The workplace stress taken as a mediator in this research is limited and is not operationalized with further stress dimension. Future research may explore more thoughtful dimensions such as burnout, work-family balance, or many more to generate insights for academicians and practitioners. Furthermore, the authors believe that workers' well-being plays a vital role in improving their productivity, and it also reduces the toxic workplace environment.
Hence, future research efforts could incorporate more determinants of workers' well-being to find new insights. Future research could also explore insights about workplace culture characterized by inherent values, sense of workplace safety, violence reduction, and behavioral mechanisms (such as policies and procedures) to address workplace toxicity.

Conclusions
The research model of this study was developed based on the insights provided in the previous literature. In this paper, our results support linkages among the determinants of a toxic workplace environment, work depression, and worker productivity. The outcomes of this study show that a toxic workplace environment (harassment, bullying, ostracism, and incivility) directly negatively influences worker productivity (Table 4). This study also verifies that work depression mediates between a toxic workplace environment (harassment, bullying, ostracism, and incivility) and worker productivity ( Table 5). The results also indicate that there is an indirect relationship between the toxic workplace environment (harassment, bullying, ostracism, and incivility) and worker productivity.
Specifically, our findings could be summarized as follows: First, workplace harassment is deep-rooted and has traumatic effects on the emotional well-being of the entire workplace. Workplace harassment decreases employee morale, which directly decreases worker productivity. Second, the toxic workplace environment and bullying create and accelerate work depression, stress, low work engagement, high absenteeism, lack of work performance, and work destruction. Third, workplace ostracism condenses and lessens work motivation among employees, and both entities (workers and organization) have to suffer in the form of decreased efficiency. Fourth, workplace intensity prompts employees to undermine performance and leave a bad image of the workplace among their peers. Fifth, workplace depression is considered a stigma among organizational employees, and most employees undergo suffering and mental illness. Another challenge facing workers is concealing their mental status at the workplace because people lack awareness about workplace depression. Not limited to workplace depression, presentism issues are also observed among workers. This is another type of low productivity, which originates when a worker comes to work but projects his/her low work involvement (mentally absent). Moreover, with workplace depression, organizations also experience worker turnover costs. Finally, the findings of this study indicate that the work environment plays a vital role in producing and raising worker productivity in line with the employee's ability and social network. Hence, organizations should focus on generating a conducive workplace environment for the well-being of the workforce. We can conclude that a toxic workplace environment increases the level of work depression. When workers feel negative about the organization, they tend to compromise their productivity level and performance, which could also increase their level of trauma.