15.2 Real-Business-Cycle Theory's Explanation to Important Economic Variables Brigg,s logarithm, we get k:1=a·kt+a1 Simplify the equation again yt=·yt1+at C+=·c41+a 友学经济学院15.2 Real-Business-Cycle Theory’s Explanation to Important Economic Variables ❖ Brigg's logarithm，we get： ❖ Simplify the equation again： t 1 t t k = k + a + t t-1 t c =  c + a t t-1 t y =  y + a