The effect of innovations on employment at the firm level is theoretically ambiguous. The present paper analyses this relationship using panel data on German start-up firms as well as German patent data. It employs different indicators of patenting activity. By applying fixed-effects and...

A dynamic panel data model of neonatal mortality and birth spacing is analyzed, accounting for causal effects of birth spacing on subsequent mortality and of mortality on the next birth interval, while controlling for unobserved heterogeneity in mortality (frailty) and birth spacing (fecundity)....

The effect of innovations on employment at the firm level is theoretically ambiguous. The present paper analyses this relationship using panel data on German start-up firms as well as German patent data. It employs different indicators of patenting activity. By applying fixed-effects and...

In this paper, we use longitudinal data on Self-Reported Health Status from the Panel Study of Income Dynamics to estimate a model of the evolution of health over the life-cycle. The model allows for two sources of persistence in health: unobserved heterogeneity, which models an individual’s...

We examine the effects of aid on growth-- in cross-sectional and panel data--after correcting for the bias that aid typically goes to poorer countries, or to countries after poor performance. Even after this correction, we find little robust evidence of a positive (or negative) relationship...

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