We investigate the impact of housing supply on affordability in rapidly appreciating subnational markets in Portugal. Our spatial econometric model confirms a negative relation between housing stock and prices, yet predicts that, on average, maintaining the construction pace of the 2000s would lower prices by only 3%, while doubling it would bring a 6% reduction. We also find significant price impacts from short-term rentals and international demand. Simulations indicate that a policy mix combining moderate supply growth with sensible limitations in those domains could more effectively alleviate affordability pressures in high-demand regions, bringing spatial nuance to the  supply's scepticism debate. 

We examine the association between union density and wages in Portugal where just 10 percent of all workers are union members but nine-tenths of them are covered by collective agreements. Using a unique dataset on workers, firms, and collective bargaining agreements, we examine the union density wage gap in total monthly wages and its sources - namely, worker, firm, and job-title or `occupational' heterogeneity - using the Gelbach decomposition. The most important source of the mark-up associated with union density is the firm fixed effect, reflecting the differing wage policies of more and less unionized workplaces, which explains two-thirds of the wage gap. Next in importance is the job-title fixed effect, capturing occupational heterogeneity across industries. It makes up one-third of the gap, the inference being that the unobserved skills of workers contribute at most only trivially to the union density wage gap. In a separate analysis based on disaggregations of the total wage, it is also found that employers can in part offset the impact of the bargaining power of unions on wages through firm-specific wage arrangements in the form of the wage cushion.  Finally, union density is shown to be associated with a modest reduction in wage inequality as the union wage gap is highest among low-wage workers. This result is driven by the job-title fixed effect, low-wage workers benefiting more from being placed in higher paying `occupations.'

Whereas wage inequality has risen markedly in most OECD countries in recent decades, it has fallen in several Southern European economies. To shed light on this phenomenon, we embed sectoral bargaining, which is common in Southern European economies, in a dynamic search and matching model. We estimate the model using comprehensive employer-employee data from Portugal for the last two decades and its data on collective bargaining agreements in different sectors, which allows us to assess the evolution of rent sharing. We find that since the mid-2000s, worker bargaining power has grown slightly at the bottom of the skill distribution while shrinking at the middle and top, contributing to the compression of the wage distribution. These changes, which persisted even during the Great Recession, increased the importance of sectoral bargaining in wage determination, weakened the relationship between wages and firm productivity, and reduced the assortative matching of workers to firms.