Roman Sittl, Arne Jonas Warnke, 18 September 2016

In sports economics, competitive balance refers to how well opponents are matched in terms of their ability to win. A lack of competitive balance implies that match outcomes will be more predictable and less interesting for fans. This column uses two decades of Bundesliga data to investigate whether competitive balance is decreasing in German football. Good players are increasingly playing for better teams, denoting a reduction in competitive balance. Although this reduction doesn’t seem to have affected fans’ interest, the results emphasise how revenue and regulations can affect competitive dynamics.

Alena Bičáková, Štěpán Jurajda, 26 July 2016

Positive assortative matching between college graduates has been well documented in marriage markets. Using European survey data, this column explores whether graduates form couples within their field of study. A third of married or cohabiting graduate couples both studied within the same field. These results are driven in part by assortative matching, and there are notable differences across fields of study as well as across countries.

Wolfgang Dauth, Sebastian Findeisen, Jens Südekum, 21 February 2016

A common theme of recent trade theory models is that globalisation-related shocks induce worker sorting across industries, labour markets, and plants. However, there is little empirical evidence of shocks causing such endogenous mobility responses. This column explores how rising international trade exposure affected the job biographies and earnings profiles of German manufacturing workers since the fall of the Berlin Wall. Individuals are found to systematically adjust to globalisation, with a notable asymmetry in the individual labour market responses to positive and negative shocks. Critically, the push effects out of import-competing manufacturing industries are not mirrored by comparable pull effects into export-oriented branches.

Jeremy Greenwood, Nezih Guner, Georgi Kocharakov, Cezar Santos, 22 February 2014

How Americans form and dissolve families has changed dramatically since 1950. One of these changes has been an increase in assortative mating, i.e. how likely a person is to marry someone of similar educational background. This column argues that since education is an important determinant of income, these patterns of matching have had an important impact on the economy's distribution of income.

Andrew Bernard, Andreas Moxnes, Karen-Helene Ulltveit-Moe, 15 November 2013

Discussions of international trade often focus on aggregate trade flows, but it is firms that trade, not countries. This column presents evidence from Norwegian export data showing that larger exporters have more customers and greater dispersion in customer size. Moreover, exporters with many customers tend to sell to importers with few suppliers. These stylised facts are captured by a model in which finding a buyer is costly. The model’s prediction that export responses are amplified in destinations with less buyer dispersion is confirmed in the data.