This paper disproves Diamond's search theory. Diamond transformed from an identity of employed workers and filled jobs to another of their surplus. This paper proves that such transformation is invalid, and that the resulting identity does not hold. This paper also proves that even the asset...

This paper proves that the Mortensen-Pissarides matching theory is nothing but a tautology. They started with an assumption and ended with the same as solution. Their assumption/solution is also at odds with the Beveridge, or the negative vacancy-unemployment relation

COVID-19 has exacerbated concerns about the rise of the robots and other automation technologies. This paper analyzes empirically the impact of past major pandemics on robot adoption and inequality. First, we find that pandemic events accelerate robot adoption, especially when the health impact...

This paper studies the probability of filling a vacancy, how it varies with the number of unemployed and number of vacancies in the local labor market, and what impact it has on employment. A greater availability of unemployed workers should make it easier for a firm to fill a vacancy but more...

The labor search and matching model plays a growing role in macroeconomic analysis. This paper provides a critical, selective survey of the literature. Four fundamental questions are explored: how are unemployment, job vacancies, and employment determined as equilibrium phenomena? What...

This paper measures the job-search responses to the COVID-19 pandemic using realtime data on vacancy postings and job ad views on Sweden's largest online job board. First, new vacancy postings drop by 40%, similar to the US. Second, job seekers respond by searching less intensively, to the...

According to search-matching theory, the Beveridge curve slopes downward because vacancies are filled more quickly when unemployment is high. Using monthly panel data for local labour markets in Sweden we find no (or only weak) evidence that high unemployment makes it easier to fill vacancies....

This paper measures the job-search responses to the COVID-19 pandemic using realtime data on vacancy postings and ad views on Sweden's largest online job board. First, the labour demand shock in Sweden is as large as in the US, and affects industries and occupations heterogeneously. Second, the...

One of the most important long-run trends in the U.S. labor market is polarization, defined as the relative growth of employment in high-skill jobs (such as management and technical positions) and low-skill jobs (such as food-service and janitorial work) amid the concurrent decline in...

Professor Christopher Pissarides was awarded the 2010 Nobel Prize in Economics jointly with Peter Diamond and Dale Mortensen ‘for their analysis of markets with search frictions’. Though Pissarides is best known for his work in this area, it is only part of a very extensive research agenda...