Given any countable collection of regression procedures (e.g., kernel, spline, wavelet, local polynomial, neural nets, etc.), we show that a single adaptive procedure can be constructed to share their advantages to a great extent in terms of global squared L2 risk. The combined procedure...

Our objective is to obtain an accurate estimate of the degree of intergenerational income mobility in Canada. We use income tax information on about 400,000 father-son pairs, and find intergenerational earnings elasticities to be about 0.2. Earnings mobility tends to be slightly greater than...