Studies Challenge Wisdom Of GOP Candidates' Plans CHARLES BABINGTON Key proposals from the Republican presidential candidates might make for good campaign fodder. But independent analyses raise serious questions about those plans and their ability to cure the nation's ills in two vital areas, the economy and housing. Consider proposed cuts in taxes and regulation, which nearly every GOP candidate is pushing in the name of creating jobs. The initiatives seem to ignore surveys in which employers cite far bigger impediments to increased hiring, chiefly slack consumer demand. "Republicans favor tax cuts for the wealthy and corporations, but these had no...