TY - BOOK AU - Chan,Louis K.C. AU - Karceski,Jason AU - Lakonishok,Josef TI - On portfolio optimization : forecasting covariances and choosing the risk model AV - HG4529.5 C426O PY - 1999/// CY - Cambridge, Mass. PB - National Bureau of Economic Research KW - PORTFOLIO MANAGEMENT KW - UNITED STATES KW - ECONOMETRIC MODELS KW - STOCKS KW - PRICES KW - FORECASTING KW - ECONOMETRIC MODE KW - RISK MANAGEMENT KW - ECONOMICS KW - RESEARCH ER -