There long has been an imbalance in what we know about the demand side versus the supply side of housing markets, with our understanding of housing demand being much greater. Partly, this has been driven by policy interests, although data availability has played a big role, too. Fortunately, this knowledge gap has begun to narrow in recent years, allowing for a much better understanding of housing markets in general. Given the importance of housing in the economy and the recent dramatic swings in home prices, better insights into the residential market are very helpful both to policymakers and households.