List of Articles شاخص هزینه فرصت منابع داخلی Open Access Article Abstract Page Full-Text 1 - Examining the comparative advantage of food and beverage products' exports using the opportunity cost of domestic resources Saeedeh Morshedi Masoud Nonnejad Mehrzad Ebrahimi Ali Haghighat 10.30495/jae.2022.26890.2218