Amazon Mechanical Turk is a very widely-used tool in business and economics research, but how trustworthy are results from well-published studies that use it? Analyzing the universe of hypotheses tested on the platform and published in leading journals between 2010 and 2020 we find evidence of...

In this paper, we investigate the effect of a change in childcare subsidies on parental subjective well-being. Starting in 1997, the Canadian province of Québec implemented a generous program providing $5-a-day childcare to children under the age of 5. By 2007, the percentage of children...

This paper provides estimates of the effects of smoking policies on self-reported well-being using US county-level data. Because the bans were implemented at different times, it is possible to exploit these variations to identify the effect on a broad range of outcomes like self-reported...

Journals favor rejections of the null hypothesis. This selection upon results may distort the behavior of researchers. Using 50,000 tests published between 2005 and 2011 in the AER, JPE and QJE, we identify a residual in the distribution of tests that cannot be explained by selection. The...

This paper investigates the effects of local smoking bans on different outcomes using county and time variation over the last 20 years in the US. First, I find no evidence that local smoking bans in bars, restaurants and workplaces decrease the prevalence of smoking. The estimates are very small...

In this paper, we investigate the effect of a change in child care subsidies on parental subjective well-being. Starting in 1997, the Canadian province of Quebec implemented a generous program providing $5-a-day child care to children under the age of 5. By 2007, the percentage of children...

Journals favor rejection of the null hypothesis. This selection upon tests may distort the behavior of researchers. Using 50,000 tests published between 2005 and 2011 in the AER, JPE, and QJE, we identify a residual in the distribution of tests that cannot be explained by selection. The...

This paper investigates the effects of local smoking bans on different out-comes using county and time variation over the last 20 years in the US. First, I find no evidence that local smoking bans in bars, restaurants and workplaces decrease the prevalence of smoking. The estimates are very...

In this paper, we investigate the effect of a change in childcare subsidies on parental subjective well-being. Starting in 1997, the Canadian province of Québec implemented a generous program providing $5-a-day childcare to children under the age of 5. By 2007, the percentage of children...