The person behind this website is Dr. Costas Leon. Costas has 20 years of teaching experience in mathematics, statistics and economics from post-secondary educational institutions to college to public university. He also has more than 10 years of teaching experience in business and hotel management schools in Switzerland. Apart from teaching, Costas has conducted statistical analysis in sociological research and worked as financial and statistical analyst as well as software developer. His main research (academic journal articles, conferences and a book) is in the field of economic fluctuations and the propagation of random shocks in macroeconomy by means of time and frequency domain methods. He holds a PhD in economics in the area of macroeconomics and time series econometrics. He lives in Lucerne, Switzerland.