RT Journal Article T1 Testing Non-nested Semiparametric Models: An Application to Engel Curves Specification A1 Delgado, Miguel A. A1 Mora, Juan AB This paper proposes a test statistic for discriminating between two partly non-linear regression models whose parametric components are non-nested. The statistic has the form of a J-test based on a parameter which artificially nests the null and alternative hypotheses. We study in detail the realistic case where all regressors in the non-linear part are discrete and then no smoothing is requiered on the estimating the non-parametric components.We also consider the general case where continuous and discrete regressors are present. The performance of the test in finite samples and discussed in the context of some Monte Carlo experiments. The test is well motivated for specification testing of Engel curves. We provide an application using data from the 1980 Spanish Expenditure Survey. PB John Wiley & Sons SN 0883-7252 YR 1998 FD 1998 LK https://hdl.handle.net/10016/2438 UL https://hdl.handle.net/10016/2438 LA eng DS e-Archivo RD 31 may. 2024