Assessment of the Degree of Factors Impact on Employment in Ukraine’s Agriculture

: Agriculture is an important branch in Ukraine’s economy. The share of agriculture’s GDP in the national economy is more than 10%. The development of agriculture stimulates the development of other sectors in national economy. According to the results of the analysis of the employment dynamics in Ukraine’s agriculture, it was concluded that there was a negative tendency. That is why the aim of the article is to specify the factors of impact on employment in Ukraine’s agriculture and to assess the degree of their inﬂuence. To achieve this goal, the different methods were used: system analysis—for determination the factors inﬂuencing employment in agriculture; factor analysis, multiple regression analysis, principal components method—for evaluating the impact of various factors on the employment in agriculture of Ukraine. It was found that the most signiﬁcant social-demographic factors of impact on employment in Ukraine’s agriculture include the total rural population at the age 16–64 and the demand for labor force in agriculture, and the most important economic factor is labor productivity. Determining the factors and measures of their impact on employment will substantiate public policy measures, methods and mechanisms for their implementation to solve employment problems in Ukraine’s agriculture.


Introduction
Agriculture has historically played an important role in the development of Ukraine's economy. That branch supplies the population with food, and provides the food security and food independence of the country. Due to the great economic and natural resource potential (41.5 million ha of agricultural lands, reaching 68.7% of the total land fund, one third of Ukraine's population lives on rural territory, favorable natural and climatic conditions), our country is deeply integrated into the global agro-food markets and increases its competitive capacity. Recently, the importance of agriculture at the international commodities markets has increased, supplying inflow of foreign currency into our country, strengthening its political-economic positions in the globalized world space, and contributing to the general economic growth.
However, along with the above-mentioned positive aspects, the social-economic development of the branch is also characterized by negative tendencies. In particular, they are revealed in the insufficient level of state support for agriculture, depression of the social infrastructure in villages, reduction in the rural population, low level of income, growth of the intensity of labor migration, etc. The identified negative phenomena prevent revealing the potential of the agrarian sphere in Ukraine to the full. rural territories, particularly in the context of decentralization, European integration and globalization [36][37][38][39][40][41][42][43][44][45][46][47][48][49]. However, in spite of the great scope of scientific research, the issues of determination of the factors influencing employment in the domestic agriculture, need a deeper investigation. A deep analysis of those factors and determination of their impact are relevant topics as they are necessary for the development of the future effective state policy concerning social and economic development of the country, support for the growth of employment in agriculture, and to enhance the branch competitiveness.
In economics, there are numerous theories of employment, which consider the factors influencing employment. In particular, Smith, A. [50] and Say, J.-B. [51] in the classical theory of employment define the market as a self-regulating system that allows full employment of the population under the condition of absolute non-interference of the state in economic processes.
In contrast, Keynesian theory of employment by Keynes, J.M. [52] calls unemployment a natural phenomenon, and employment requires active state intervention in labor market relations. Neoclassical (Marshall, A., etc.) and neoliberal (Hayek, F., Pigou, A., etc.) theories [53], the rational expectations theory (Lucas, R.E. [54], etc.) consider the market (including the labor market) as a self-regulating system with perfect competition. In the context of these theories, state intervention in the process of providing employment through the regulation of prices, credit interest, supply and demand (Marshall, A.), the distribution of national income through the system of taxes and subsidies (Pigou, A.) is either absent or insignificant.
Representatives of Neo-Keynesian theories, such as the theory of the economic cycle (Hansen, A. [55,56]), the theory of economic growth (Harrod, R. [57,58], Domar, E. [55]) studied the problem of choosing between employment and inflation rate. Thus, Harrod, R. [58] studied the dynamics of economic factors such as labor force, available capital and production output or per capita income and identified the continuous growth of income as one of the most important factors in the entire economic system. Hansen, A. [56] and Domar, E. [55] with the help of the ratio of the growth of investment to the relative growth of income that caused these investments, proved the inverse relationship between the growth of national income and employment and the subsequent growth of investment.
One of the main signs of employment, according to representatives of the concept of human development (Sen, A. [59]) is to obtain and increase income. According to the theory of human capital (Schultz, T. [60], Becker, G. [61], etc.), employment is considered as one of the means of obtaining and growing income and its subsequent investment in education, health care, child rearing, etc. Under the absence of decent work conditions, income from employment will not fully meet the basic needs of the population. In addition, productive employment, according to the theory of human capital, is also the goal of socio-economic and political development, a way to achieve them, a tool for socialization, sphere of communication and recognition of the population.
Given the current conditions of the Ukrainian economy, determining and assessing the impact of factors on employment in agriculture to focus on one of the many existing theories of employment is impossible. In our opinion, such analysis and assessment should be based on a symbiosis of various theories, including Keynesian theory, the theory of economic growth and the concept of human development.
The aim of the article is to specify the factors of impact on employment in Ukraine's agriculture and to assess the degree of their influence basing on the economic and mathematic analysis.

Materials and Methods
In order to achieve the defined aim, the following research tasks were formulated: to analyze the current conditions and to identify trends in employment in Ukraine's agriculture, -to identify and systematize the basic factors influencing employment in agriculture of Ukraine, -to assess the degree of the factors' impact on employment in Ukraine's agriculture.
The dialectical method of scientific cognition was used to solve the tasks of research and achieve the set purpose, as well as general scientific and special methods. In analyzing the current condition of employment in Ukraine's agriculture and for assessing the trends of employment, methods of statistical analysis were used: method of averages and relative values, trend analysis, the comparative analysis in order to compare the results obtained in individual years. It was done to establish certain relationships, such as identity, similarity or difference between the characteristics and facts.
The system analysis was used for the determination of the factors influencing the number of people employed in agriculture and their next classification.
Modelling of employment in agriculture as a branch of the national economy and evaluating the impact of various factors are made by applying the method of factor analysis to develop a regression equation on the whole time interval (2000-2019) of collected relevant data. The authors used statistical data, which were the social-demographic and economic factors of impact on the dynamics of the indicator of the number of people employed in agriculture. The principal component method was used for reducing the model size (to reduce the dimensionality of data without losing the information) and presenting it in a more compact and convenient form.
Abstract-logical method was used for generalizing scientific and methodological approaches to the study of the employment in Ukraine's agriculture and formulation of conclusions.
The information base of the research was the data of the State Statistics Service of Ukraine [62].
The methodology used in the study follows the below steps ( Figure 1). It should be noted that collecting statistical information and developing the database covering: the number of population, employed in Ukraine's agriculture, the number of registered unemployed people among rural population, labor demand in agriculture, wages in the agrarian sector, the number of those economically active among the rural population, the GDP of agriculture, investments in agriculture, export and import of agricultural products, gross added value in agriculture, agricultural production, labor productivity, share of animal production and crop production in the total outcome, amounts of sold products and other macroeconomic indicators.

The Current Conditions of Employment in Ukraine's Agriculture
The current conditions of employment in agriculture have experienced great transformations, caused by changes of the role and format of the agrarian sector's impact on the development of Ukraine's national economy in total. Nowadays, employment in domestic agriculture is characterized by the following tendencies: changes in the structure of agricultural production. The volume of agricultural production in crop production, being a less labor consuming branch, has recently increased, whereas in animal production the situation is different (Table 1) (Table 2).  This confirms a strong tendency of misbalancing of the conjuncture of the rural labor market in the direction of increase in the labor supply of working-age rural population under a low demand for it. Recently, the situation at the rural labor market has improved, i.e., the number of unemployed per one job vacancy at the enterprises of agriculture, hunting and forestry industries reduced to 64 people in 2016-2018. However, the share of job vacancies in the agrarian sphere in their total amount in Ukraine is still at a low level (4.28%). Moreover, the indicator reduced by 1.45 p.p. in 2002-2018 (Table 2).
reduction in the number and sometimes total absence of new job vacancies. According to the statistical data (see Table 2) in 2005-2016, the dynamics of enterprises' demand for employees in agriculture, hunting and forestry industries continuously reduced. At the end of 2016, the demand for employees in agriculture was at the level of 1.5 thousand people. In 2017, the increasing trend of labor demand was initiated and it amounted for 2.5 thousand people in 2018. However, the share of vacancies in the agrarian sphere was generally insignificantly reduced, i.e., by 4.28%; -low labor productivity. Labor productivity is an important indicator of the economy's competitive capacity, including agriculture. The characteristics of modern agriculture include its low level, whereas the statistical data confirm a recent seven times increase in the labor productivity in agriculture, particularly in crop production-6.21 times, in animal production-almost 9.56 times (Table 3). Such a tendency manifests a growth of enterprises' profitability and outcome of products. However, it has a contradictory impact on employment, because labor productivity can be improved due to the automation of actions and processes, and robot automation that results in staff redundancy; -low wages in the agrarian sector of economy. In spite of the increasing wage of people employed in agriculture, its size is still lower than the wage of people engaged in industry and amounts for 74.1 % of the wage of the last (Figure 2).
Considering the above-mentioned, one can conclude about a significant differentiation of the income of working-age rural population, loss of the value of rural work, growth of poverty and intensification of social and property differentiation and consequently, outflow of the economically active population from the rural territory; -reduction in economically active rural population and deformation of its age structure, i.e., according to the statistical data, 41% of the rural residents are retired people, and almost 18% of rural residents have reached the age of 65 years [62]. Therefore, the share of population of the older working age increases at the rural labor market.

Influence Factors on Employment in Ukraine's Agriculture
Employment is a dynamic concept that is changed in time and space under the pressure of different conditions. Therefore, the effective solution of the problem of employment in agriculture is impossible without a complete analysis of the problem-causing factors. Given the diversity of influences and differences in the nature of their occurrence, it is advisable to systematize them. We propose to distinguish the current factors, influencing employment in the branch into groups, which are consolidated at the Figure 3. Subjective (individual) factors include age, gender, education, professional and personal qualities, self-employment ability, health status, and so on. According to research by Nartiuk, O. [4], the increase in the proportion of people who face age restrictions in employment correlates with increasing age. On the other hand, gender in most cases does not play a significant role in the employment of the economically active population in agriculture. However, there may be cases where the lack of a sufficiently developed infrastructure of pre-school institutions in rural areas can be an obstacle to employment for women who have children of preschool and primary school age. Lack of modern vocational education also has a negative impact on employment. The presence of chronic diseases or deterioration of health is also a good reason for refusing employment. Thus, according to a study by Nartiuk, O., 36% of employers believe that the presence of illness in employees leads to improper performance of their duties and requires frequent replacement of the absent employee and redistribution of his responsibilities [4].
According to the results of the study, it is established that employment in Ukraine's agriculture depends mainly on objective factors, namely on the population, including being able-bodied, wages, agricultural development, production volumes and structure, availability of a sufficient number of market-forming enterprises, migration processes, employment institutions, state social policy measures, political stability, etc., which are at the same time factors of external influence. Thus, the reduction in the working population reduces the supply of labor in the rural labor market. Lower wages in agriculture compared to other industries demotivate workers and promote their migration to cities. Reducing the number of enterprises, reducing the scale of their activities limit the labor demand. Employment is a dynamic concept that is changed in time and space under the pressure of different conditions.
In their integrity, those factors and various combinations of their components create social stereotypes relating to the quality of labor force and the models of behavior of the labor market entities, respectively, which directly or indirectly influence employment in the branch.
To assess the factors' impact on employment in Ukraine's agriculture, the authors applied modeling.

Modeling of Employment in Ukraine's Agriculture and Assessment of the Degree of Main Factors Impact
According to the results of the research on the number of people, engaged in agriculture (a dependent variable, depicted by the Figure 4), and referring to the data of the State Statistics Service of Ukraine [62], various stages have been specified. Agriculture as a source of employment in the primary sector faces a long term trend of sectoral decline everywhere, the result of economic development, and the EU is no exception [49].
Modeling of employment in agriculture as a branch of the national economy and examination of the degree of impact of the main factors are made by applying the method of factor analysis to develop a regression equation on the whole time interval (2000-2019) of collected relevant data, which are depicted in the Appendix A, Table A1. The main task of factor analysis is to reduce the number of variables (data reduction) and to determine the structure of relationships between variables. To conduct the study, the authors analyzed 23 indicators. The authors used statistical data, which were the socialdemographic and economic factors of impact on the dynamics of the indicator of the number of people employed in agriculture. In particular, social-demographic factors include the rural population at the age 16-64 (working population), registered unemployed people among the rural population, labor demand in agriculture, wage in the branch, etc. In the study, the authors in assessing the impact of factors on employment in agriculture took into account the working population. According to the current legislation, namely the Law of Ukraine "On Employment" of 05.07.2012 № 5067-VI (as amended), the working population is persons over 16 years of age who have not reached the retirement age. Sixteen years is the age from which employment is allowed according to the current legislation of Ukraine and 64 years is the age before retirement.
Economic factors influencing the dynamics of the indicator of the employment in the branch first determine the GDP of agriculture, investments in agriculture, export and import of agricultural products and a set of other factors, which can influence the number of employed people, for example time trend, gross added value in agriculture, agricultural production, labor productivity, share of animal production and crop production in the total outcome, amounts of sold products and other indicators (Appendix A, Table A1). The structure of agricultural production is a significant factor that affects employment in Ukraine's agriculture. Crop production, unlike animal production, is less labor-intensive. In recent years in Ukraine there is a steady trend to increase the share of crop production in the structure of agricultural production. If in 1990 the share of crop production was 51.5% of the total, in 2018-already 73.7%. Accordingly, the share of animal production as a more labor-intensive industry has decreased, livestock is declining, livestock complexes are closing, leading to the dismissal of workers in the sector, and this has a negative impact on employment in agriculture in general. Unemployed workers in the short term will not be able to retrain to work in crop production. In addition, crop production does not require such a large number of workers dismissed from animal production.
Next, the method of correlation and regression analysis was used to identify relations between the factors, they were studied for collinearity. Therefore, the research results determine the functional dependence between the factors of product outcome and labor productivity, index of agricultural products and net export of agricultural products, between the gross production and the share on animal products in it. Moreover, the impact of some factors on the resultant value was doubtful. Therefore, the following research and building of the model were based on the figures of the reliable factors of impact (Table 4). Results of the analysis of the impact of social-demographic and economic factors on employment in the branch are presented in the Tables 5 and 6.
The regression equations have satisfactory econometric properties, in particular they are checked for the absence of multicollinearity. Moreover, the hypothesis on distribution of the residuals by the normal law, absence of autocorrelation and residuals heteroscedasticity is tested.
The equation consistency is confirmed by the obtained correlation factor and regression coefficients. The dependences are accurate by the Fisher test, as well as coefficients of the equation under the variables, which confirms the substantiality of the selected factors' impact on the resultant value, i.e., on the number of people employed in the branch, with the probability of 0.95, are statistically significant.
According to the results of the conducted multiple regression analysis, it is reasonable to make the following conclusions: all social-demographic factors have direct impact on the resultant value (Equation (1)). In particular, an increase in the rural population aged 15-64 by one thousand people, the growth of the demand for labor force by one thousand people, and a 1% raise in the share of the branch wage in the economy cause the employment increase in the branch by 0.898; 0.546 and 0.395 thousand people, respectively, relating to the average values in the sample.
The two first economic factors, particularly agricultural production per one employed in agriculture and ratio of investments to the GDP, make a reverse influence on the resultant value, whereas an increase in the net export results in a growth of the number of people employed in the branch. Referring to the Equation (2) coefficients, one can conclude that a raise in labor productivity by UAH 1 thousand per one employed person, increase in the ratio of investments to the GDP by 1 %, and reduction in the net export by USD 1 million cause a decrease in the number of people employed in agriculture by 1.366, 0.185 and 0.579 thousand people, respectively, relating to the average values in the sample.
To assess the impact of each separate factor on employment in the branch, the authors made calculations of the partial correlation factors, which demonstrated that the most significant social-demographic factors of impact included the first (rural population at the age 16-64) and the second factors (demand for labor force in agriculture) (r yx 1 ·x 2 x 5 = 0.82 and r yx 2 ·x 1 x 5 = 0.79). The most important economic factor is labor productivity (agricultural production in constant prices of 2010 per 1 employed in agriculture (r yx 7 ·x 11 x 16 = −0.84).
The model obtained based on correlation-regression analysis includes quite a lot of parameters, some of which are characterized by significant correlation (multilinearity). Therefore, there is a need to create a simplified model that should describe the source data as accurately as possible. To reduce the model size, the principal component analysis [63] was used. The principal components method is designed to evaluate large models and to estimate the parameters of the model, if it includes multicollinear variables [64]. Using the principal components method, we can express several factors through one, namely, combine them and work with a simpler model. It is impossible to avoid the loss of information, but the principal components method minimizes these losses [65]. Therefore, X 1 , X 2 , X 5 can be substituted by one variable, i.e., the main component U 1, whereas X 7 , X 11 , X 16 -by the main component U 2 .
The Eigen values of the initial data are calculated and used to develop a diagram ( Figure 5).   The above-presented results of application of the principal component analysis (Table 7) confirm that U 1 = −0.5797 × X 1 − 0.5466 × X 2 + 0.6043 × X 5 (3) Therefore, the dependence of employment in Ukraine's agriculture on the two groups of factors can be described by a two-variable linear equation:

Economic factors Social-demographic factors
Application of the principal component analysis has supplied systematization and complex assessment of the impact of social-demographic and economic factors on employment in the branch.

Discussion
Considering the important place of agriculture in Ukraine's economy, the negative employment situation is a potential threat not only for its effective development, but also for the sustainable social development and economic safety of the state in general. For example, in the agricultural sector of the EU, the employment rate is continuously decreasing due to farms becoming bigger and more productive [49]. A similar scenario awaits Ukraine. This paper has discussed the determination of the factors of impact on employment in Ukraine's agriculture and assessed the degree of their influence.
Given that each country, and, accordingly, the agriculture in it, has its own peculiarities and differences related to geographical location, natural and climatic factors, dynamics of economic development, availability of resources, etc., we consider it incorrect to impose the results of our research on other economics. However, it should be noted that some conclusions coincide. In particular, Kerstin, N. and Ostermeier, M. [18], Sumedh, R. [24] confirm in their research the negative impact of increasing investments and agricultural production on employment in agriculture. Sumedh, R. [24] developed his thought, arguing that the relationship between production and employment can varies as a result of the type of produce, the structure of the business. Our conclusion that the forced need for agricultural enterprises to raise wages of employees will lead to their layoffs and, consequently, to a decrease in employment in agriculture, confirmed by Petrick, M. and Zier, P. in their research [29].
The paper has used a factor analysis, multiple regression analysis and principal components method for modelling and evaluating the impact of various factors on the employment in agriculture of Ukraine, has introduced and discussed the relevant parameters derived from the large sets proposed in the literature, and has provided evidence of the solution's effectiveness through a discussion of the modelling result. This approach gave a perfect image of the state of the matter. The principal component method was used for presentation of the model of employment in agriculture in a more compact and elegant form without losing the least bit of information. However, further studies are still necessary to improve the methodology and the possibility of including more indicators into the model.

Conclusions
To sum up the conducted research on the determination of the factors of impact on employment in Ukraine's agriculture and to assess the degree of their influence, it is necessary to make the following conclusions.
The number of people engaged in Ukraine's agriculture decreased by 31% for the period 2000-2019. The authors identified such factors that caused this negative trend: changes in the structure of agricultural production (the volume of agricultural production in crop production, being a less labor consuming branch, has recently increased, whereas animal production has decreased), reduction in the sphere of agricultural work application, disproportion of the conjuncture of rural labor markets, deficit of job vacancies, low labor productivity, low level of earnings, decrease in the economically active rural population, deformation of its age structure, etc.
To assess the degree of impact of each group on employment in agriculture, the factor analysis was used. The results of the conducted multiple regression analysis confirm that all social-demographic factors make a direct impact on employment in agriculture. In particular, an increase in rural population at the age 15-64 by one thousand people, raise in the demand for labor force by one thousand people, and increase in the share of the wage earned in the branch by 1 % in the economy cause a growth of employment in the branch by 0.898, 0.546 and 0.395 thousand people, respectively, relating to the average values in the sample. Based on the research results, it becomes clear that the state's social policy should primarily include measures to improve the demographic situation in rural areas, enhancing the living standards of the rural population, developing their professional skills and increasing productivity, reducing the differentiation between the incomes of rural and urban populations, to promote the development of an effective business environment. Because these socio-demographic factors have a positive impact on the employment in agriculture, the activation of business activity in agriculture, including through the diversification of activities, in particular the development of agricultural products processing, will contribute to the creation of new job places, extension of the spheres of labor application, etc. A growth in the share of wage in the branch referring to the wage in the economy in general indicates no discrimination of the income of the rural working-age population, raise in the value of rural work, and consequently will cease the outflow of the economically active population from the rural area, improve its age structure and contribute to an increase in the number of employed in agriculture.
Such economic factors as agricultural production per one employed in agriculture and ratio of investments to the GDP make a reverse influence on the resultant value, whereas an increase in the net export results in a growth of the number of employed in the branch. However, a raise in labor productivity by UAH 1 thousand per one employed person, and the ratio of investments to the GDP by 1 %, as well as reduction in the net export by USD 1 million force reduction in the number of people, employed in agriculture by 1.366, 0.185 and 0.579 thousand people, respectively, relating to the average values in the sample. The increase in production in Ukraine's agriculture is mainly associated with an increase in production efficiency, attraction of investments for its technical and technological improvement, modernization, automation of production processes and operations. Such scientific and technological progress inevitably leads to job place losses and, consequently, to a reduction in employment in the branch. Exports and imports instead create new job places, primarily related to servicing exports and imports directly. There is a need for specialists in the field of foreign trade, who are familiar with market research, international law, concluding foreign trade contracts, engaged in logistics, sales, etc. This explains the positive impact of net exports' growth on employment in agriculture.
The partial correlation factors demonstrate that the most significant social-demographic factors of impact include the rural population at the age 16-64 and the demand for labor force in agriculture. The most important economic factor is labor productivity (agricultural production in constant prices of 2010 per one employed in agriculture). The application of the principal component analysis has provided systematization and complex assessment of the impact of social-demographic and economic factors on employment in the branch.
In the light of the presented research, the authors definitely intend to continue working on the problem of employment in agriculture, arising from the action of numerous factors, both internal and external, which will also allow them to be present in the scientific discussion on an international forum. The promising directions of the further scientific search in the mentioned context suggest development of the state policy measures, argumentation of the methods and mechanisms of their implementation to regulate the situation, which is currently experienced at the rural labor market, and to solve the problems of employment in the domestic agriculture.
The authors plan to conduct a comparative analysis of the situation on the agricultural labor market of Ukraine and other countries, including the EU, to define common features and regional peculiarities, to identify opportunities for using European experience in providing employment in agriculture in Ukraine. Research methods will also be developed for forecasting the level of employment in agriculture under the impact of a single factor or a combination some of them.

Conflicts of Interest:
The authors declare no conflict of interest.
Appendix A Table A1. Symbol, title of the indicator and its impact on the employment in Ukraine's agriculture.