THE DUAL‐PROCESS DRIFT DIFFUSION MODEL: EVIDENCE FROM RESPONSE TIMES

We introduce a model of response time and choice that borrows from two distinct psychological traditions. As in dual‐process models, rapid (automatic) decisions are qualitatively different from considered decisions. As in the drift diffusion model, delayed (considered) decisions occur when confidence hits a threshold level. We conduct a simple experiment in which our hybrid model matches key properties of the data. As our model predicts, decision times are bimodal, automatic decisions are of far lower quality than considered decisions, and automatic decisions are more prevalent when prior information improves, thereby raising their quality. (JEL D83, D87, C91)     

Symbolic revolutions. Mobilizing a neglected Bourdieusian concept for historical sociology

Theory and Society - The article builds on a recent literature that has sought to underscore the relevance of Bourdieu’s field theory for historical-sociological analysis. It draws attention...     

An Experimental Investigation of Procurement Auctions with Asymmetric Sellers

Electronic reverse auctions are a commonly used procurement mechanism. Research to date has focused on suppliers who are ex ante symmetric in that their costs are drawn from a common distribution. However, in many cases, a seller's range of potential costs depends on their own operations, location, or economies of scale and scope. Thus, understanding how different bidder types impact auction outcomes is key when designing an auction. This study reports the results of the first controlled laboratory experiment designed to compare prices between first‐price and second‐price procurement auctions for homogeneous goods when seller cost types are asymmetric and the number of bidders varies. The results indicate that first‐price auctions generate lower prices regardless of market composition. The results also reveal that first‐price auctions are at least weakly more efficient than second‐price auctions despite the theoretical prediction that the reverse should hold in asymmetric auctions. Post hoc analysis of individual bidders' behavior in first‐price auctions revealed evidence that bidders systematically underbid when their cost realizations were close to the lower bound. Furthermore, bidders adjust their behavior based on the type of the other bidders in the market in a manner inconsistent with theory. Consequently, adding a third bidder to a two‐bidder market is not advantageous to the buyer unless that third bidder is a low‐cost type.     

Commentary on Knowledge Creation and Dissemination in Operations and Supply‐Chain Management

The title of this paper might have been Knowledge Creation and Dissemination in the POM Domain . Instead, these accomplished authors (who shall be dubbed with honorable intentions as RSST) define the POM domain as Operations and Supply‐Chain Management. Thereby, they leave no doubt that the POM domain spans the entire supply chain from shovels in the mine and seeds in the ground to recycled waste that is remanufactured and sold as new (as well as refurbished) products. RSST declare that sustainability of the ecosystem cycle must be achieved (even in the face of disaster conditions) by all institutions. RSST believe that practitioners can be taught the necessary attitudes and skills by business and engineering schools. It is noteworthy that the ecosystem cycle they describe is accompanied by marketing and financial decision cycles running parallel from inception of ideas to the “end of life” closure that starts a new cycle for closed‐loop product planning. For these coexisting, interdependent, all‐encompassing systems, the RSST team leaves no doubt about the evolution of teaching and research opportunities for young POM scholars. These authors focus on the fact that everything that is not morphing is likely to become counterproductive in the not too far future. This is a critical point of view which is based on the fact that the status quo is highly vulnerable. Also, very special is the RSST warning that changes are required in the status quo which must be made without damaging the existing fabric. This non‐disruptive way of doing POM business has been remarkably successful for the cohesion of the field over the past 25 years. There is agreement that it is great to shake things up without tearing those things apart. All of this leads to the conclusion that the advice of these authors (RSST) is correct and valuable. Debate and disputation of these points is encouraged and expected by the RSST team.     

Leadership as social identity management: Introducing the Identity Leadership Inventory (ILI) to assess and validate a four-dimensional model

Although nearly two decades of research have provided support for the social identity approach to leadership, most previous work has focused on leaders' identity prototypicality while neglecting the assessment of other equally important dimensions of social identity management. However, recent theoretical developments have argued that in order to mobilize and direct followers' energies, leaders need not only to ‘be one of us’ (identity prototypicality), but also to ‘do it for us’ (identity advancement), to ‘craft a sense of us’ (identity entrepreneurship), and to ‘embed a sense of us’ (identity impresarioship). In the present research we develop and validate an Identity Leadership Inventory (ILI) that assesses these dimensions in different contexts and with diverse samples from the US, China, and Belgium. Study 1 demonstrates that the scale has content validity such that the items meaningfully differentiate between the four dimensions. Studies 2, 3, and 4 provide evidence for the scale's construct validity (distinguishing between dimensions), discriminant validity (distinguishing identity leadership from authentic leadership, leaders' charisma, and perceived leader quality), and criterion validity (relating the ILI to key leadership outcomes). We conclude that by assessing multiple facets of leaders' social identity management the ILI has significant utility for both theory and practice.     

Gender differences in substance use and initiation of sexual activity

Even though widespread efforts have focused on educating young adults about HIV and AIDS, many individuals continue to engage in behaviors that place them at risk. These behaviors include frequent experimentation with alcohol and other drugs prior to sex, engaging in sexual activity with different partners, and inconsistent safe sex practices (Butcher et al. 1991). The combination of these risky behaviors causes increased concern about the spread of HIV among those of college age. This study focused on two behaviors by examining the relationship between substance use during adolescence and early initiation of sexual activity in a sample of 950 subjects aged 19–21 in a mid-sized southern city. Results indicate that early use of alcohol and marijuana relates to earlier initiation of sexual activity and subsequent risky sexual behavior among young adults. Also, gender differences were observed for frequent users of marijuana and alcohol with males engaging in riskier sexual practices. Recommendations for interventions are made.     

Long-term effects of childbearing on mortality: evidence from pre-industrial Sweden

This paper presents an analysis of the impact of childbearing history on later-life mortality for ever-married men and women using historical micro-level data of high quality for southern Sweden. The analysis uses a Cox proportional hazards model, estimating the effects on old-age mortality of number of births and timing of first and last births. By studying the effects of previous childbearing on mortality by sex and social status, we also gain important insights into the mechanisms relating childbearing to mortality in old age. The results show that number of children ever born had a statistically significant negative impact on longevity after age 50 for females but not for males. Analysis by social group shows that only landless women experienced higher mortality from having more children, which seems to indicate that the main explanations are to be found in social or economic conditions specific to females, rather than in the strictly biological or physiological effects of childbearing.