Paul Krugman did correctly sound the alarm about the 2008 housing crisis — and he’s been right about inflation (so far!).  But his review of his last decade’s hits and misses is something less than a ruthless self-inventory. Off the top of my head: He omits his argument that Timothy Geithners “stress tests” would not be enough to stabilize the financial system (an error he has admitted elsewhere) and his column declaring the V.A. health care system a “huge policy success.” …