More than 70% of global e-mail traffic consists of unsolicited and commercial direct marketing, also known as spam. Dealing with spam incurs high costs for organizations, prompting efforts to try to reduce spam-related costs by installing spam filters. Using modern econometric methods to reduce...

This paper examines the impact of innovations and wages on the demand for heterogeneous labour. Based on matched data from the IAB-establishment panel survey and the files of the employment statistics register for the year 1995, input shares derived from a generalised Leontief cost function are...

We study the effects of liquidity constraints and start-up costs on the relationship between wealth and the fraction of entrepreneurs in an economy. We develop a dynamic occupational choice model with endogenous wealth and entry into entrepreneurship. The model predicts that, with liquidity...

Previous studies report a wide range of estimates for how female labor supply responds to childcare prices. We shed new light on this question using a reform that raised the prices of public daycare. Parents respond by reducing public daycare and increasing childcare at home. Parents also reduce...

We use longitudinal data describing couples in Australia from 2001-12 and Germany from 2002-12 to examine how demographic events affect perceived time and financial stress. Consistent with the view of measures of stress as proxies for the Lagrangean multipliers in models of household production,...

Previous studies report a range of estimates for the response of female labor supply and childcare attendance to childcare prices. We shed new light on these questions using a policy reform that raises the price of public daycare. After the reform, children are 8 percentage points less likely to...

In 2007 and 2008 Polish governments introduced a series of reforms which led to a substantial reduction in the tax "wedge" (in Polish: "klin") on labour. We show that when considered together the package of introduced reforms brought much greater reductions in the tax burden compared to a widely...

We exploit homogeneous firm level data of manufacturing and non-manufacturing sectors to study the impact of firing restrictions on job flow dynamics across 14 European countries. We find that more stringent firing laws dampen the response of job destruction to the cycle, thus making job...