Politicians bemoan the lack of affordable housing, but their policies often create the problem. Look no further than Oregon, where restrictive zoning and mandates have yielded the lowest rate of residential construction in decades. Oregon’s population grew by nearly 400,000 between 2010 and 2019. But the state added a mere 37 housing permits for every 100 new residents, according to a report released last week by the Oregon Office of Economic Analysis. Economist Josh Lehner found that “while much of the attention is paid to rising housing costs, we know they are the symptom and not the cause of the...