Blocked-Error-R 2: A Conceptually Improved Definition of the Proportion of Explained Variance in Models Containing Loops or Correlated Residuals

Bentler and Raykov (2000, Journal of Applied Psychology 85: 125–131), and Jöreskog (1999a, http://www.ssicentral.com/lisrel/column3.htm, 1999b http://www.ssicentral. com/lisrel/column5.htm) proposed procedures for calculating R ² for dependent variables involved in loops or possessing correlated errors. This article demonstrates that Bentler and Raykov’s procedure can not be routinely interpreted as a “proportion” of explained variance, while Jöreskog’s reduced-form calculation is unnecessarily restrictive. The new blocked-error-R ² (beR ²) uses a minimal hypothetical causal intervention to resolve the variance-partitioning ambiguities created by loops and correlated errors. Hayduk (1996) discussed how stabilising feedback models – models capable of counteracting external perturbations – can result in an acceptable error variance which exceeds the variance of the dependent variable to which that error is attached. For variables included within loops, whether stabilising or not, beR ² provides the same value as Hayduk’s (1996) loop-adjusted-R ². For variables not involved in loops and not displaying correlated residuals, beR ² reports the same value as the traditional regression R ². Thus, beR ² provides a conceptualisation of the proportion of explained variance that spans both recursive and nonrecursive structural equation models. A procedure for calculating beR ² in any SEM program is provided.     

Uncertainty and the theory of international trade in long-run equilibrium

We consider a country with two factors and two industries, each of which faces technical and price uncertainty. Entrepreneurs choose outputs in order to maximize the expected utility of profits. They also draw factor payments and purchase consumption goods after the uncertainty isresolved. They enter and exit from an industry according to whether participation there increases their expected utility. Within this model, the validity of the propositions of neoclassical trade theory depends on how the entrepreneurs' entry decisions are affected by parameter changes via their roles as risk bearers, consumers and factor owners.     

Chinese dietary culture influences consumers' intention to use imported soy‐based dietary supplements: an application of the theory of planned behaviour

The over‐saturated dietary supplement (DS) market in developed countries such as the US spurs the need for foreign market expansion, and the Chinese market provides a great potential for the foreign soy‐based DS industry. This study examined Chinese consumers' intention to use imported (US‐made US‐brand) soy‐based DS based on the Theory of Planned Behavior (TPB). Two alternative models were also examined in which Chinese dietary culture variables, including soyfoods favourability and dining‐out sociability, as well as their interactions with attitudes, were integrated into the TPB model. A cross‐sectional, self‐administered survey was conducted with a sample of 215 subjects (137 females; 78 males) in Shanghai, China. The TPB variables attitude, subjective norm, perceived behaviour control and behavioural intention, as well as the Chinese dietary culture variables: soyfoods favourability and dine‐out sociability were measured. Multiple linear regressions were used to analyze the three models. The statistical results indicated that all three models were statistically significant to predict intention (Model 1: R² = 0.473, P < 0.001; Model 2: R² = 0.505, P < 0.001; Model 3: R² = 0.525, P < 0.001). The results also showed that attitude, perceived behavioural control, and dine‐out sociability were significant (positive) determinants of intention. Soyfoods favourability acted a significant (negative) moderator of the relationship between attitude and intention. Subjective norm had no significant impact on intention. In conclusion, the TPB model was useful to predict Chinese consumers' intention to use imported soy‐based DS, but not all the TPB components weighed significantly in exploring DS consumption in China. The selected Chinese dietary culture variables were much more important predictors than subjective norm. This study makes a significant contribution in the application of the TPB model and in market strategy development for imported dietary supplements in China.     

The comprehensive business exam: Usefulness for assessing instructional and student performance outcomes

The authors explore the results of the Comprehensive Business Exam (CBE) administered to business majors during their senior-year business capstone course. The study results identified students' SAT and grade point average as a predictor of CBE performance, and variables that explain the correlation between CBE performance, SAT score, and grade point average are discussed. This study expands the research stream by demonstrating how faculty can use CBE information to more deeply assess student learning at both the course and instructor level than is possible with the Major Field Test for Bachelor's Degree in Business.     

Consumer ethnocentrism,product necessity and quality perceptions of Russian consumers

Retail buyers in Russia have indicated that some customers have expressed a desire to purchase domestically produced products over imports. Consumer ethnocentrism has been proposed as a measure to provide retail buyers with the information necessary to market to these consumers. The purpose of this research is to determine if perceived product quality of products differs based on country of origin, product necessity and consumer ethnocentric tendency. A repeated measures ANOVA test indicates that perceived quality differs by necessity, by product, by country. A consumer ethnocentrism effect on the overall model, however, was not significant. We conclude that Russian consumers do perceive differences in product quality based on country of origin and product necessity, but that consumer ethnocentrism does not have an effect on perceived product quality.     

Consumer information on Distributor and Manufacturer Brands of food

Consumer information affirms that distributor brands of food are less expensive than corresponding manufacturer brands¹ and that these brands are equal in quality [2, p. 8]. The price difference between these two types of brands thus represents a real gain to the consumer purchasing distributor brands rather than just a case of paying less for lower quality products. Furthermore, one source has estimated that ten per cent of the grocery bill can be saved through purchasing distributor brands [6]. The credibility of this information is open to question however, as few statements concerning the price and quality of these types of brands have been carefully documented in Canada. In the light of the limited empirical support and the substantial consumer benefit involved, the purpose of this study is to test the reported relation between the price and quality of distributor and manufacturer brands. Establishing a working definition for quality is a key problem encountered in price-quality analysis. Food quality is multidimensional and its various dimensions may be classified into two broad categories: subjective or sensory attributes such as taste, aroma, appearance; and objective attributes located below the threshold of perception such as nutrients and freedom from harmful micro-organisms. Because the sensory attributes are more amenable to measurement by non-food scientists and to variation in hidden attributes being controlled by law, this paper focuses on sensory quality. The quality and preference concepts overlap to some extent, as the subjective attributes of food are common to both quality and preference. To ensure that “sensory quality” is well distinguished from overall quality, “sensory quality” is referred to as “sensory preference”. Having gone some distance towards establishing an operational definition of quality, the principal objectives are: Summary The findings, though tentative and focused on the sensory component of quality, can scarcely be regarded as providing empirical support for the price-quality information referred to earlier. Distributor brands were notably less expensive for three-quarters of the products surveyed. As well, the manufacturer brand was rated significantly higher than at least one distributor brand for four of the ten products subject to sensory evaluation. The results therefore suggest that there is a very general tendency for distributor brands to be priced lower than manufacturer brands and to be of equivalent quality.     

Perceptual difference of dependence and its impact on conflict in marketing channels in China: An empirical study with two-sided data

Although many firms have adopted the relational exchange or relationship marketing philosophy for developing long-term inter-firm relationships in marketing channels, the issues pertaining to channel conflict still deserve further investigation. The purpose of this paper is to examine the possible impact of perceptual difference of dependence between members in channel dyads on perceived channel conflict. By analyzing paired data collected from both sides of supplier-retailer dyads in China, we test two hypotheses about perceptual difference of dependence and its impact on conflict. We found that there was considerable perceptual difference of dependence between both sides of the dyads, and that the perceptual difference of dependence asymmetry between the two was positively associated with channel conflict perceived by the supplier side. Both researchers and practitioners should be aware of such differences when confronted with channel conflict issues, especially in international channel settings.