This paper tests the bilateral price-level convergence among 52 U.S. cities at the good level by using a new econometric approach. The estimated median half lives are far below the half lives found in the corresponding studies for the U.S.

A multiplicative form of the habit term in the utility function has some undesirable properties if the habit function is itself still additive (Wendner, 2003). A geometric form for the way the stock of habit accumulates can resolve these shortcomings.