Research Discussion Paper – 1974 Equation (A.27)

∂ H ∂ λ = WE ( 1 − TY ) SL − PN . DN − PT . DT   =   0 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaSaaaeaacq GHciITcaqGibaabaGaeyOaIyRaeq4UdWgaaiabg2da9iaabEfacaqG fbWaaeWaaeaacaaIXaGaeyOeI0IaaeivaiaabMfaaiaawIcacaGLPa aacaqGtbGaaeitaiabgkHiTiaabcfacaqGobGaaiOlaiaabseacaqG obGaeyOeI0IaaeiuaiaabsfacaGGUaGaaeiraiaabsfacaaMc8Uaey ypa0JaaGPaVlaaicdaaaa@531A@