The Covid-19 pandemic has induced worldwide natural experiments on the effects of crowds. We exploit one of these experiments currently taking place over several countries in almost identical settings: professional football matches played behind closed doors. We find large and statistically...

Drawing on 28 million observations on people's running times in a free weekly 5 kilometre running event, Parkrun, we examine whether labour market conditions affect fitness. Running times improve during recessions for men and women aged 50 and above but worsen for men aged 20-49 and women aged...

Since the demise of the Bretton Woods system, the yen has seen several episodes of strong appreciation, including in the late 1970s, after the 1985 Plaza Agreement, the early and late 1990s and after 2008. These appreciations have not only been associated with "expensive yen recessions"...