Startups contribute significantly to the economic development of a country. Despite their importance and promising future, they are extremely fragile, mainly for their lack of tangible and intangible resources. Since this can be obtained through an incubation process, business incubators (BIs)...

This paper proposes a new combined semiparametric estimator of the conditional variance that takes the product of a parametric estimator and a nonparametric estimator based on machine learning. A popular kernel-based machine learning algorithm, known as the kernel-regularized least squares...