TY JOUR TI REAL OPTIONS IN THE VALUATION OF HIGH-TECHNOLOGY COMPANIES: USING PATENT AND R&D INDICATORS TO EXPLAIN M&A PREMIUMS KW real options KW high-technology firms KW patent indicators KW R&D intensity KW M&A premiums KW valuation KW technological uncertainty KW innovation potential JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Gafarov, M.G. PY 2025 IS 0 PB ITBO University