The subject of unobservable variables encompasses this thesis. These latent (i.e., unobservable) variables must be inferred using statistical models or observable proxies. The objectives of my doctoral thesis are to develop and test new statistical models to infer these variables and link them...

This dissertation comprises of three stand-alone research papers, all considering the use of high frequency financial data for financial market risk measurement. The first chapter considers the extraction of liquidity information from the intraday limit order book to enhance the daily market...