Complex sentence: The hazard function is a concave function of F (x; b,\\ eta): the curvature is all the steeper as\\ eta is large; contrary to some other distributions, the function cannot be expressed in a closed-form expression.
Split into simpler sentences: The hazard function is a concave function of F (x; b,\\ eta): the curvature is all the steeper as\\ eta is large. Contrary to some other distributions, the function cannot be expressed in a closed-form expression.