When you make the evaluation of things, when you look at these kinds of investments, it is very important. I think maybe it is more important than engineering to understand the economy, the macro economy. The macro economy is very important, to know the national accounts, what means fiscal deficit, what means trade deficit or trade superávit (surplus), what means each item, but not only quantitative, but also qualitative. I think economy is very important, to know the basics of economy. To understand what is happening, you need to understand economy. You need to understand the financial statements of the companies, the sectors, and to have world references.