Fig. 5
From: Scale effects on efficiency and profitability in the Swiss banking sector
Evolution of estimated relationship between log(Total Assets) and efficiency/profitability. Note: Plots show estimated coefficients \(\beta _t\) from regressions \(y_{it}=\alpha _t + \beta _t log(Total Assets)_{it} + \varepsilon _{it}\), with associated 95% confidence intervals (standard errors clustered by bank). In the left panel, y is the cost-to-income ratio (CIR); in the right panel, y is return on assets (ROA)