Traffic jams are an important problem both on an individual and on a societal level and much research has been done on trying to explain their emergence. The mainstream approach to road traffic monitoring is based on crowdsourcing roaming GPS devices such as cars or cell phones. These systems...

In a bold and risky political move the Greek prime minister Alexis Tsipras called for a referendum on June 27 2015 quitting ongoing negotiations with Greece's creditors in Brussels. The referendum framed as a yes or no question asked the Greek voters to decide whether or not they approve or...

On February 20 2015 Irish Premier Enda Kenny confirmed that a "yes-no" referendum on same sex marriage would be held on May 22 of the same year. A yes vote would legalise same sex marriage in Ireland. As the Irish premier put it, the vote was about "tolerance, respect and sensitivity". The...

I create a time series of weekly ratios of Google searches, in the US, on buying and selling in the Real Estate Category of Google Trends. I call this ratio the Google US Housing Market BUSE Index or simply the BUSE index. It expresses the number of "buy"-searches for each "sell"-search which,...

We derive a measure of the relatedness between economic activities based on weighted correlations of local employment shares, and use this measure to estimate city and activity complexity. Our approach extends discrete measures used in previous studies by recognising the extent of activities'...

Work complexity can be an important factor contributing to the observed employment and wage developments. Using German data, we find that it increased substantially between 1986 and 2012. Work complexity was higher for high-educated employees in the past but differences have leveled out in 2012...

Entrepreneurship in most advanced economies is in decline. This comes as a surprise: many scholars have expected an upsurge in entrepreneurship. What are the reasons for the decline? In this paper I first document the extent of the decline in terms of entrepreneurial entry rates; the share of...

We introduce a new task-based framework to describe production. It focuses on the fact that certain tasks are too complex for many workers to perform. In such an environment, the relationship between wages of workers may significantly differ from their relative productivities. The labor market...