You're confusing co-occurrence with causality. Texas has energy resources (natural gas and oil) which kept their overall economy and specifically their housing market relatively healthy over the past 4 years even when many of their other economic sectors declined a similar amount to the rest of the county. Nothing to do with regulation. It's the same reason Russia was able to stay financially afloat with far less pain than western Europe. By your analysis, you would expect Russia to be far less regulated than western Europe. In fact, it is much more regulated.