Study characteristics and effect size data in 20 studies included in the meta-analysis.

Abbreviations: AEX = Amsterdam Euronext Stock Exchange; ASX = Australian Securities Exchange; Board = mean size of the board; CACM = China’s A-Share Capital Market; Country = country of data collection; CSE = Colombo Stock Exchange; Data Source = Sampling Source of the studies; DC = developing country; DEV = developed country; FTSE = Financial Times Stock Exchange; GNI = Gross National Income Classification; HI = high-income; IPO = Initial Public Offering; ISE = Indonesian Stock Exchange; LI = low-income; Mean (SD) = mean (and standard deviation) of the performance measure; MFI = Microfinance Institutions; MSE = Madrid Stock Exchange; N = number of observations (number of firms × total length of data collection in years); NSE = Nigerian Stock Exchange; No. Firms = Number of firms in sample; OSE = Oslo Stock Exchange; Period = time frame in which data were collected; % Female = percentage of female board members.Study characteristics and effect size data in 20 studies included in the meta-analysis.