The investigation of causal relations between economic phenomena presents many problems of peculiar difficulty, and offers many opportunities for fallacious conclusions. Since the statistician can seldom or never make experiments for himself, he has to accept the data of daily experience, and discuss as best he can the relations of a whole group of changes; he cannot, like the physicist, narrow down the issue to the effect of one variation at a time. The problems of statistics are in this sense far more complex than the problems of physics.
Kate del Castillo
For me to start working, projects have to catch my attention whether they are here (in the USA) or in Mexico. All I want is to be involved in projects that are interesting to me, projects that are a challenge wherever they may happen, in Spain, in China, or in Hollywood.
