We propose a novel view of selection bias in longitudinal surveys. Such bias may arise from initial nonresponse in a probability sample, or it may be caused by self-selection in an internet survey. A contraction theorem from mathematical demography is used to show that an initial bias can...

One of the areas of policy research where randomized field trials have been utilized most intensively is welfare reform. Starting in the late 1960s with experimental tests of a negative income tax and continuing through current experimental tests of recent welfare reforms, randomized evaluations...

Integrating economic experiments into household surveys provides unique possibilities. We introduce the German Socio-Economic Panel's Innovation Sample (SOEPIS), which offers researchers detailed panel data and the possibility to collect personalized experimental and survey data for free. We...

Integrating economic experiments into household surveys provides unique possibilities. We introduce the German Socio-Economic Panel’s Innovation Sample (SOEP-IS), which offers researchers detailed panel data and the possibility to collect personalized experimental and survey data for free. We...

In this paper we propose a simple one-factor quantile regression model based on realized volatility to forecast Value-at-Risk (VaR). The model only uses daily realized volatility as input and thus simplifies estimation substantially compared with most other methodologies currently used to...

For linear panel data models with fixed effects and sample selection, we correct for selectivity bias in the within-group estimator. The proposed procedure is equivalent to a pooled weighted least squares based on pairwise differences augmented with correction terms. A computationally affordable...

This study aimed at investigating preferences regarding nominal income, standing in income distribution, and income change over time. We used a nationally representative sample and employed Discrete Choice Experiment methodology in the random utility framework. We estimated trade-offs...

The vast majority of empirical studies in finance employ large enough sample sizes and use the conventional thresholds for statistical significance. This routine practice can potentially lead to spurious statistically significant results. The primary aim of this paper is to present a rule of...