2.1. The Economic Effect of the Casino Industry
It is widely known that the casino industry is good for the national economy. Official statistics support this statement. For instance, according to American Gaming Association (AGA) [
14], the total gross gaming revenue of U.S. casinos amounted to about US
$40.28 billion in 2017, indicating an increase of 3.4% over 2016. In addition, AGA also reported that there are 460 commercial casinos, which generated approximately
$9.23 billion in direct gaming tax revenue in 2017. As for Macao, the situation is similar. Macao is considered the world’s biggest gaming center, and its gaming industry has played a significant role in the economy. For example, casinos generated about US
$37.6 billion in 2018 [
15]. In particular, the role of casinos is important because taxes from casinos account for 80% of the Macau government’s total revenue [
15]. The importance of the casino industry is no exception for Korea. The operating system of a casino in Korea is different to those in other countries as a casino’s entrance is classified according to nationality. The total number of casinos in Korea is 17. Among them, only one casino, Kangwon Land Casino, is available for Koreans and is located in Jeongson-Gun Kwangwon Province, while others are operating for foreign nationals. Kangwon Land Casino was designed to contribute to improving the regional economy in 2001, making about US
$400 million with 900,000 visitors. Currently, the casino generates about US
$2.7 billion with five million visitors in 2017 [
16]. These statistics from each country indicate the casino industry is an economically viable industry and plays a crucial role in the development of national and regional economies.
2.2. Casino Service Quality
It is widely accepted that service quality is regarded as an important factor in enhancing customer satisfaction and behavioral intention, so academics and practitioners have taken great effort to find ways to improve service quality in diverse fields [
17,
18,
19,
20]. The importance of service quality is no exception to the casino industry, so previous empirical studies have done a lot of work to identify the important role of service quality factors in the casino industry [
21,
22,
23,
24,
25,
26,
27,
28].
Table 1 summarizes the research on service quality in the casino industry. For instance, Lam et al. [
25] applied servicescape, consisting of five dimensions: ambience, navigation, seating comfort, interior décor, and cleanliness to the casino industry in order to identify how the physical environment affects customer satisfaction as well as behavioral intentions. They collected data from 513 casino customers in Macau and found that servicescape, except for ambience and cleanliness, has a positive influence on customer satisfaction, which in turn positively affects behavioral intentions. Based on the results of the data analysis, they suggested that casinos are required to focus more on navigation (e.g., sight lines, aisle width, signs/directions), seating comfort (seat back, elbow room, distance from table), and interior décor (e.g., background colors, wall treatment design, and floor treatment design).
Mayer and Johnson [
27] collected data from 185 casino customers in order to examine the important factor of casino atmospherics and suggested that the following elements of casino atmospherics are considered critical casino atmospherics: enjoyment, décor/color, floor layout, theme, employee uniforms, ceiling heights, and noise level. Lio and Rody [
26] explored the important role of the service environment in the casino industry using data collected from 158 Chinese gamblers in Macau. They found that seating comfort, cleanliness, interior decoration, and gaming facilitators are positively associated with overall quality, which in turn affect emotions. Wong and Fong [
28] first proposed CASERV (known as casino service quality), which consists of (1) game service, (2) service environment, (3) service delivery, and (4) food service. They collected data from 238 casino customers and found that four sub-dimensions of CASERV have high levels of convergent validity, discriminant validity, and internal consistency. Carrying the previous study a step further, Hwang and Han [
21] explored the important role of CASERV affecting outcome variables using empirical data collected from 228 casino customers in the United States. They found that CASERV, except for food service, has a positive impact on brand prestige, which in turn positively affects social value, brand preference, and revisit intentions, suggesting that casino managers need to provide (1) many different table games and slot machines, (2) a pleasant environment to play casino games, and (3) high quality of employee service.
Jeon and Hyun [
23] developed a theoretical model in order to identify the effects of casino service quality on casino customer satisfaction using 1500 baby boomers. Their results were similar to CARSERV. For instance, they found the following five dimensions of casino service quality: slot machines, table games, non-gaming attributes (e.g., employee service, hotel rooms, and restaurant), winning perception, and promotions and benefits. In addition, they showed that such casino service qualities positively affect casino customer satisfaction. Jeon et al. [
24] used the SERVQUAL model in order to find the antecedents and consequences of casino players’ satisfaction. They collected data from 383 casino players and found that four dimensions of SERVQUAL (tangibility, responsiveness, assurance, and empathy) were found to be important predictors of casino players’ satisfaction. In addition, they suggested that casino players’ satisfaction plays a significant role in the formation of brand affect and game spending. Consequently, they stressed that casinos need to focus more on tangible parts (e.g., diverse gaming equipment, comfortable game areas, and attractive physical surroundings) and systematic training programs for enhancing responsiveness, assurance, and empathy.
More recently, Hwang et al. [
22] tried to investigate the important role of casino dealers during the table games using 224 casino table game players. They suggested that three types of perceived dealer attribute (i.e., expertise, likeability, and customer orientation) help to enhance rapport between players and dealers. In addition, the same authors argued that rapport between players and dealers plays an important role in the formation of satisfaction, commitment, and customer citizenship behavior (i.e., feedback, advocacy, helping, and tolerance), suggesting that it is necessary to provide a well-developed training program for casino dealers in order to form favorable relationships with casino players.
In summary, previous studies have proposed the following eight sub-dimensions of service quality including game duration, casino capacity, internal environment, number of games, service quality, comps, instruction, and entrance fee either individually or collectively in the casino industry [
21,
23,
27]. In particular, such service qualities aid to form customer satisfaction and behavioral intentions, so they have a direct impact on casino profits [
22,
28].
2.3. Choice Experiment
Across many disciplines including transportation, environmental studies, marketing, as well as tourism and hospitality, the choice experiment (hereafter CE) has been popularly utilized to be better aware of consumers’ innate preferences for particular products and services. This microeconomic technique is known to be advantageous in assessing consumer surplus or demand for hypothetical goods and services that are not available in real markets [
29,
30]. Following the stated preference (hereafter SP) theory, which involves requesting respondents to choose a favorite option from a range of alternatives, the CE is acknowledged as offering a deeper insight into consumers’ willingness to pay for hypothetical products than the contingent valuation method (CVM), the most typical SP-based economic valuation technique [
31]. This advantage is attributed to the CE’s basis assuming respondents’ complicated trade-offs among multiple attributes [
32].
Apart from the theory of utility maximization postulating that regular consumers with budget constraints choose optimal products that are believed to provide the greatest amount of utility, the CE is based on another important assumption of random utility theory. According to this theory, utility comprises two different aspects: Observable and unobservable. The utility of an individual
i choosing a hypothetical product
j can be expressed as
Uij =
Vij +
ϵij =
βXij +
ϵij, where
Vij represents the observable element;
ϵij, the unobserved random error component;
Xij, a combination of different levels of attributes;
β, the vector of parameter estimates. The probability of choosing a product
j can be shown as,
, which can be represented using the conditional logit model proposed by McFadden [
33]. This traditional conditional logit algorithm largely violates the restrictive assumption of the independence of irrelevant alternative (hereafter IIA) denoting that “the ratio of the choice probabilities of any two alternatives is entirely unaffected by the systematic utilities of any other alternatives” [
34].
In order to evade the IIA requirement, previous studies have recruited the random parameter logit (hereafter RPL) model while incorporating the unobservable respondents’ preference heterogeneity in the deterministic element of the utility function through handling parameter estimates of different attributes as random variables [
35]. This modeling approach is accordingly useful in examining how parameter estimates are distributed, assumed by researchers to have a particular distribution pattern, which reflects the presence of respondents’ preference heterogeneity [
36]. Since each random parameter is not known, the unconditional probability can be integrated over all values of
β using the maximum simulated likelihood estimation (hereafter MSLE) as
for a given value of
θ. In order to better view respondents’ heterogeneous preference structures, a set of socio-demographic and attitudinal features are often included into the indirect utility functions [
30]. Among different MSLE methods, the Halton draws has been most popularly used for stable parameterization [
37].
The application of the latent class (hereafter LC) model is known to be another effective scheme for eschewing the restrictive IIA property. This model enables researchers to recognize how many heterogeneous groups of respondents (i.e., segments) characterized by relatively homogeneous preference structures are present in the sampled population [
38]. The infinite number of segments can be endogenously determined through class membership functions, which are dependent upon respondents’ socio-demographic and attitudinal features [
39]. Given that a consumer
i belongs to class
s, the probability can be expressed as
, where
βs represents segment-specific parameter estimates. Since the addition of socio-demographic and attitudinal factors affects the class membership function, the probability that the respondents
i becomes a member of class
s can be presented as
, where
Zi represents a vector of personal characteristics;
λs denotes a vector of parameter estimates. Through combining these equations, the probability that the consumer
i belongs to group
s and purchases the product
j can be expressed as
(see Greene and Hensher [
40] for details on the LC model).