“…For example, the study assumed central limits and therefore did not explicitly control for other influences on the coefficients such as operating risk (Amit and Livnat, 1988a;Lev, 1974), labor-capital ratio (Subrahamanyam and Thomadakis, 1980), organizational structure (Bettis and Chen, 1986), the structural characteristics of the merging firms' selected industries (Brealey and Myers, 1981;Moyer and Chatfield, 1983), environmental influences such as regulatory changes (Armour and Teece, 1978), and market conditions (Amit and Livnat, 1988b;Lubatkin and O'Neill, 1987).…”