Key points are not available for this paper at this time.
1 17 75 52 2 7 78 8' ', , , , 1 1 & &2 21 12 20 0, , ( (, , 1 1 1 1= = ( (1 17 75 5 ( () ) 2 25 5 7 78 8' ', , ( (6 6, , 1 1 & &2 21 12 20 0, , & &6 6 1 1' ', , 1 1 1 1& & ( (WORKING PAPER no.
Guiso 외. (화,) 이 질문을 연구했다.