Admittedly, economics first aims at solving empirical problems-for instance, what are the causes of unemployment?-and, to this purpose, it elaborates on the principles of the working of the economy. Now, this book suggests a modern conception of economics, called 'monetary analysis'. According to the latter, the fundamental principles of the working of the economy are inseparable from money, while this primacy of money entails a specific way of solving empirical problems.