> This emphasis on single-family homes in their data sources affects the generalizability of their conclusions about the impact of supply constraints across different types of housing markets, especially in dense urban areas where multi-family units and rentals are more prevalent.

But that's what people are typically complaining the most about, so fair enough that they focus on it.

> They also only go as far back as 1980. The difference between supply constraints between 1980 and 2025 is very small compared to the difference between 1965 and 1980. Take Los Angeles as an example [1]. The zoned capacity of many metro areas was dramatically reduced by the mid 1970s.

That' supports their point though, if the supply constraints differences have been small between 1980 and 2025, but the house price increase has been large, then supply constrains can't really explain house price increase? Or am I misunderstanding your point?