The U.S. housing market crisis has been marked by tight inventory and high prices, but two economists pointed to a source of affordable homes that could be unlocked by amending a federal law from 1974. More precisely, the elimination of five words from the National Manufactured Housing Construction and Safety Standards Act would boost demand for and the availability of manufactured homes, according to Lee Ohanian and James Schmitz, who are economists at UCLA and the University of Minnesota, respectively. In an op-ed in the Washington Post on Tuesday, they said amending the law to remove the requirement that manufactured homes must be “built on a permanent chassis” would make them more attractive to consumers, save them money, and be safer, providing a “first step in bringing back this once-popular housing alternative.” Just before passage of that law, 1 in 3 single-family homes that were produced in the U.S. were manufactured, meaning they were built completely in a factory...