A Horvitz-Thompson predictor is proposed for spatial sampling when the characteristic of interest is modeled as a random field. Optimal sampling designs are deduced under this context. Fixed and variable sample size are considered.

This article investigates the determinants of bank loan survival time in an emerging economy for ‘micro’, ‘small’ and ‘medium’-sized enterprises. We use proprietary data from the Central Bank of Mexico for approximately 1.5 million company loans between January 2010 and May 2017. Our...