Housing transactions by moving homeowners take two steps—buying a new house and selling the old one. This paper argues that the transaction sequence decisions of moving homeowners have important effects on the housing market. Moving homeowners prefer to buy first whenever there are more buyers than sellers in the market. However, this congests the buyer side of the market and increases the buyer–seller ratio, further strengthening the incentives of other moving owners to buy first. This endogenous strategic complementarity leads to multiple steady state equilibria and large fluctuations, which are broadly consistent with stylized facts about the housing cycle.

This article explains the cyclical behavior of the fluctuations in unemployment and vacancies by demand externalities. Adding such externalities to an otherwise standard search and matching model reduces the need for exogenous shocks in explaining these fluctuations. Under plausible parameter values, the equilibrium dynamics include a stable limit cycle that resembles the empirically observed counterclockwise cycles around the Beveridge curve. Calibrated to the duration of the business cycle, these endogenous "Beveridge cycles" are as persistent as the data, without losing any of the amplification of the standard model. * Manuscript

Do more people choose to become self-employed when search frictions decline? The origin story of the gig economy suggests that improvements in communication technologies increase the self-employment rate, while cross-country evidence suggests the opposite. We reconcile conventional wisdom with the data by introducing frictions in labour and goods markets in a new model of self-employment. Declining labour market frictions decrease self-employment, while declining goods market frictions increase self-employment. We study the impact of the most salient recent reduction in frictions -the roll-out of broadband Internet -in a panel of OECD countries. We find that the effect of declining goods market frictions dominates: the arrival of broadband Internet has halted three quarters of the average downward trend in self-employment rates.

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