We derive the first closed-form optimal mortgage refinancing rule. The expression is derived by using the Lambert-W function to solve a tractable class of mortgage refinancing problems. We calibrate our solution and show that our quantitative results closely match those reported by researchers...

We derive the first closed-form optimal refinancing rule for mortgages: Refinance when the current mortgage interest rate falls below the original mortgage interest rate by at least (1/ψ)[φ W(-exp(-φ))], where W(.) is the principal branch of the Lambert W-function, ψ=((√(2(ρ λ)))/σ),...

The authors find that firms that face higher upfront commitment fees, risk premium spreads or usage fees have smaller credit lines, while those with higher overdraft fees have larger ones. Firms with greater profit growth in the past have larger credit lines, while those with more internal funds...

Bank lending is an important source of funding for firms. Most loans are in the form of credit lines. Empirical studies of line demand have been complicated by their use of data on publicly traded firms, which have a wide menu of financing options. We avoid this problem by using a unique...

Economics