Comparing Two-Stage Segmentation Methods for Choice Data with a One-Stage Latent Class Choice Analysis

Market segmentation is a key concept in marketing research. Identification of consumer segments helps in setting up and improving a marketing strategy. Hence, the need is to improve existing methods and to develop new segmentation methods. We introduce two new consumer indicators that can be used as segmentation basis in two-stage methods, the forces and the dfbetas. Both bases express a subject’s effect on the aggregate estimates of the parameters in a conditional logit model. Further, individual-level estimates, obtained by either estimating a conditional logit model for each individual separately with maximum likelihood or by hierarchical Bayes (HB) estimation of a mixed logit choice model, and the respondents’ raw choices are also used as segmentation basis. In the second stage of the methods the bases are classified into segments with cluster analysis or latent class models. All methods are applied to choice data because of the increasing popularity of choice experiments to analyze choice behavior. To verify whether two-stage segmentation methods can compete with a one-stage approach, a latent class choice model is estimated as well. A simulation study reveals the superiority of the two-stage method that clusters the HB estimates and the one-stage latent class choice model. Additionally, very good results are obtained for two-stage latent class cluster analysis of the choices as well as for the two-stage methods clustering the forces, the dfbetas and the choices.     

Connecting the Dots in Public Management: Political Environment, Organizational Goal Ambiguity, and the Public Manager's Role Ambiguity

This article is a systematic effort to study a key theoreticalquestion from the vantage point of public sector organizationalbehavior. Most political science models, with a primary interestin democratic control of bureaucracy, study the political influenceon the bureaucracy from an agency theory perspective. Organizationbehavior literature, on the other hand, is focused largely onthe study of individual-level phenomena in private organizationsand does not incorporate political context as part of explanatorymodels. This article proposes a middle-range theory to "connectthe dots," beginning with disparate sources in the polity influencingorganizational goal ambiguity, which in turn is expected toincrease managerial role ambiguity. An empirical test, usingdata collected from a national survey of managers working instate human service agencies, supports this theoretical model.We find that certain types of political influence have an impacton organizational goal ambiguity, which in turn has a directeffect in increasing role ambiguity and also an indirect effectin increasing role ambiguity through organizational structure.     

Predicting group consciousness among Asian Americans: Considering commonalities,shared interests,panethnic group identification,and linked fate

Identifying factors linked to the development of group consciousness is important toward bettering our understanding of group formation processes among marginalized ethnoracial groups. This study examines predictors of group consciousness among Asians and Asian Americans in the United States, focusing on numerous dimensions of this concept, including linked fate, panethnic group identification, and four specific sources of perceived group commonality and interests: (1) cultural, (2) economic, (3) political, and (4) racial. We use data from a national survey to examine socio-structural, political, discrimination, and immigration correlates associated with separate dimensions of Asian group consciousness. We found that perceiving interpersonal discrimination increased the importance of being Asian; heightened the odds of feeling linked fate with other Asian people; and enhanced the odds of identification as “Asian American.” Republicans and Independents were less likely to perceive different elements of Asian group consciousness compared to Democrats. Educational attainment, income, gender, employment status, ethnicity, and English-speaking comfortability had varying effects across certain measures of Asian group consciousness. For Asians and Asian Americans, interpersonal discrimination and certain socio-structural, political, and immigration factors may be especially meaningful toward the development of linked fate, shared group interests and commonalities, and panethnic identification, all of which are key toward activating group consciousness.     

Multiscale drivers of amphibian community occupancy in urban ponds

Urban Ecosystems - Urbanization has driven the loss of natural aquatic habitats while concurrently increasing the abundance of artificial urban ponds. Urban ponds are not typically designed for...