An interesting paper by Buchheim and Watzinger (2023) published in AEJ: Economic Policy [15(1)] shows that investments in public buildings in Germany can quickly and cost-effectively increase employment in the short run. They can be a viable tool for counteracting an economic slowdown.
They explore if the renovation of public buildings create jobs quickly and cost-effectively? Their paper estimates the causal impact of a sizable German public investment program, which provided 0.16% of GDP for upgrading public buildings, on employment at the county level. The program focused on improving the energy efficiency of school buildings, making it possible to use the number of schools as an instrument for investments. It also enforced tight deadlines, reducing potential implementation lags. The program was cost-effective, creating, on average, one job for one year for an investment of €24,000. The employment gains are detectable after nine months and are accompanied by an unemployment reduction amounting to half of the job creation. Employment grew predominately in the directly affected industries.
They addressed the endogeneity problem (governments may target regions that are hardest hit by the recession) by exploiting the legal structure of the stimulus bill. The bill prescribed that 65 percent of funds had to be spent on investments in the educational infrastructure, in particular on improving the energy efficiency of existing buildings. This implies that the local scope for investments was closely linked to the historically predetermined number of schools. Since the number of schools is a predetermined stock variable and thus unrelated to the magnitude of the recession in a county, it constitutes an ideal instrument for local investments. To put the cost of one job per year in perspective, the average labor costs in the construction industry was at least €45,000. The employment gains translate into a fiscal multiplier of about 1.5.
