Choice and the Internet: From Clickstream to Research Stream

The authors discuss research progress and future opportunities for modeling consumer choice on the Internet using clickstream data (the electronic records of Internet usage recorded by company web servers and syndicated data services). The authors compare the nature of Internet choice (as captured by clickstream data) with supermarket choice (as captured by UPC scanner panel data), highlighting the differences relevant to choice modelers. Though the application of choice models to clickstream data is relatively new, the authors review existing early work and provide a two-by-two categorization of the applications studied to date (delineating search versus purchase on the one hand and within-site versus across-site choices on the other). The paper offers directions for further research in these areas and discusses additional opportunities afforded by clickstream information, including personalization, data mining, automation, and customer valuation. Notwithstanding the numerous challenges associated with clickstream data research, the authors conclude that the detailed nature of the information tracked about Internet usage and e-commerce transactions presents an enormous opportunity for empirical modelers to enhance the understanding and prediction of choice behavior.     

Prototyping: a key to managing product development

Extended development cycles put companies at risk through loss of sales, margins, market share, and credibility as innovators. The author suggests constructing early-stage models to provide a dress rehearsal for new products and help companies develop products in less time.     

Keiretsu and relationship-specific investment: implications for market-opening trade policy

This paper considers the implications of relationship-specific investment within keiretsu for policies aimed at opening the Japanese market for intermediate goods, such as auto-parts. Both VIEs applied to parts and VERs restricting Japanese exports of autos cause the keiretsu to import a wider range of parts, but of a relatively unimportant type, such as seat covers. Since keiretsu investment and output fall, the total value of US parts exports may actually fall. For a given value of these exports, a VIE is less costly for US consumers and Japanese producers, but a VER is preferred by US automakers.     

The Dynamics of African-American Health: A Historical Perspective

There are many misconceptions about African American health that have subtle and continuing influence on health policy debates. Unfortunately, many of the misconceptions surrounding African American health have an implicit historical dimension, and the usual response for the lack of evidence in support of any myth is that “the data does not exist” to shed full light on the given question. This is unfortunate as there is now a growing body of evidence pertaining to the historical health of the African American population, and this data is currently being used to uncover a number of facts about the historical dynamics of African American health. In this paper, we show that our historical data on the health of African Americans is wholly lacking and at the same time show that one prominent myth about trends in African American health does not stand up to historical investigation. We conclude with a brief note about where this research is headed and what future topics should be explored in African American economic and health history.