Inference from Web surveys may be affected by non-random selection of Web survey participants. One approach to reduce selection bias is to use propensity scores and a parallel phone survey. This approach uses demographic and additional so-called Webographic or lifestyle variables to balance...

The Asset and Health Dynamics Among the Oldest Old (AHEAD) study shows a large increase in reported total wealth between 1993 and 1995. Such an increase is not found in other US household surveys around that period. This paper examines one source of this difference. The authors find that in...

Web surveys have several advantages compared to more traditional surveys with in-person interviews, telephone interviews, or mail surveys. Their most obvious potential drawback is that they may not be representative of the population of interest because the sub-population with access to Internet...

Differences in answers in Internet and traditional surveys can be due to selection, mode, or context effects. The authors exploit unique experimental data to analyze mode and context effects controlling for arbitrary selection. The Health and Retirement Study (HRS) surveys a random sample of the...

Individuals' subjective expectations are important in explaining heterogeneity in individual choices, but their elicitation poses challenges. In this paper, the authors present their findings from testing an innovative visual representation of an Internet survey in the context of individuals'...

The authors present a generalized solution to Grossman's model of health capital (1972), relaxing the widely used assumption that individuals can adjust their health stock instantaneously to an "optimal" level without adjustment costs. The Grossman model then predicts the existence of a health...

After almost three decades of sustained economic growth, Indonesia is currently in the midst of a major economic and financial crisis. This paper seeks to contribute new evidence on three questions: who has been affected most by the crisis, how they have been affected and how they have responded...

Recall bias is a pervasive problem in the analysis of retrospective data (Shyrock et al., 1973; Ewbank, 1981). The problem is a recurrent concernin the litterature on the determinants of breastfeeding duration, its trend over time, and the effect of breastfeeding on infant mortality.

This paper examines wealth data in the Health and Retirement Study (HRS).