Iowa Individual Income Tax School District Report, Tax Year 2004

Iowa School District Surtax Report 2004

Iowa Individual Income Tax School District Report, Tax Year 2005

Iowa School District Surtax Report 2005

Iowa Individual Income Annual Tax Statistical Report 1997

Iowa Individual Income Tax Statistical Report 1997

Iowa Individual Income Tax Annual Statistical Report 1998

Iowa Individual Income Tax Statistical Report 1998

Iowa Individual Income Tax Annual Statistical Report 1999

Iowa Individual Income Tax Statistical Report 1999

Iowa Individual Income Tax Annual Statistical Report 2000

Iowa Individual Income Tax Statistical Report 2000

Iowa Individual Income Tax Annual Statistical Report 2001

Iowa Individual Income Tax Statistical Report 2001

Iowa Individual Income Tax Annual Statistical Report 2002

Iowa Individual Income Tax Statistical Report 2002

Iowa Individual Income Tax Annual Statistical Report 2003

Iowa Individual Income Tax Statistical Report 2003

Iowa Individual Income Tax Annual Statistical Report 2004

Iowa Individual Income Tax Statistical Report 2004

Iowa Individual Income Tax Annual Statistical Report 2005

Iowa Individual Income Tax Statistical Report 2005

Spanning tests in return and stochastic discount factor mean-variance frontiers: A unifying approach

We propose new spanning tests that assess if the initial and additional assets share theeconomically meaningful cost and mean representing portfolios. We prove their asymptoticequivalence to existing tests under local alternatives. We also show that unlike two-step oriterated procedures, single-step methods such as continuously updated GMM yield numericallyidentical overidentifyng restrictions tests, so there is arguably a single spanning test.To prove these results, we extend optimal GMM inference to deal with singularities in thelong run second moment matrix of the influence functions. Finally, we test for spanningusing size and book-to-market sorted US stock portfolios.