【请问】：时间固定效应模型的representation中PER_EFFECT如何计算得来

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PER_EFFECT = C(58)*@ISPERIOD("1981") + C(59)*@ISPERIOD("1982") + C(60)*@ISPERIOD("1983") + C(61)*@ISPERIOD("1984") + C(62)*@ISPERIOD("1985") + C(63)*@ISPERIOD("1986") + C(64)*@ISPERIOD("1987") + C(65)*@ISPERIOD("1988") + C(66)*@ISPERIOD("1989") + C(67)*@ISPERIOD("1990") + C(68)*@ISPERIOD("1991") + C(69)*@ISPERIOD("1992") + C(70)*@ISPERIOD("1993") + C(71)*@ISPERIOD("1994") + C(72)*@ISPERIOD("1995") + C(73)*@ISPERIOD("1996") + C(74)*@ISPERIOD("1997") + C(75)*@ISPERIOD("1998") + C(76)*@ISPERIOD("1999") + C(77)*@ISPERIOD("2000") + C(78)*@ISPERIOD("2001") + C(79)*@ISPERIOD("2002") + C(80)*@ISPERIOD("2003") + C(81)*@ISPERIOD("2004") + C(82)*@ISPERIOD("2005") + C(83)*@ISPERIOD("2006") + C(84)*@ISPERIOD("2007") + C(85)*@ISPERIOD("2008")

NMRJCSR_JS = PER_EFFECT + C(1) + C(2)*@ISPERIOD("1981")*LYCZ_JS + C(3)*@ISPERIOD("1982")*LYCZ_JS + C(4)*@ISPERIOD("1983")*LYCZ_JS + C(5)*@ISPERIOD("1984")*LYCZ_JS + C(6)*@ISPERIOD("1985")*LYCZ_JS + C(7)*@ISPERIOD("1986")*LYCZ_JS + C(8)*@ISPERIOD("1987")*LYCZ_JS + C(9)*@ISPERIOD("1988")*LYCZ_JS + C(10)*@ISPERIOD("1989")*LYCZ_JS + C(11)*@ISPERIOD("1990")*LYCZ_JS + C(12)*@ISPERIOD("1991")*LYCZ_JS + C(13)*@ISPERIOD("1992")*LYCZ_JS + C(14)*@ISPERIOD("1993")*LYCZ_JS + C(15)*@ISPERIOD("1994")*LYCZ_JS + C(16)*@ISPERIOD("1995")*LYCZ_JS + C(17)*@ISPERIOD("1996")*LYCZ_JS + C(18)*@ISPERIOD("1997")*LYCZ_JS + C(19)*@ISPERIOD("1998")*LYCZ_JS + C(20)*@ISPERIOD("1999")*LYCZ_JS + C(21)*@ISPERIOD("2000")*LYCZ_JS + C(22)*@ISPERIOD("2001")*LYCZ_JS + C(23)*@ISPERIOD("2002")*LYCZ_JS + C(24)*@ISPERIOD("2003")*LYCZ_JS + C(25)*@ISPERIOD("2004")*LYCZ_JS + C(26)*@ISPERIOD("2005")*LYCZ_JS + C(27)*@ISPERIOD("2006")*LYCZ_JS + C(28)*@ISPERIOD("2007")*LYCZ_JS + C(29)*@ISPERIOD("2008")*LYCZ_JS + C(30)*@ISPERIOD("1981")*YYCZ_JS + C(31)*@ISPERIOD("1982")*YYCZ_JS + C(32)*@ISPERIOD("1983")*YYCZ_JS + C(33)*@ISPERIOD("1984")*YYCZ_JS + C(34)*@ISPERIOD("1985")*YYCZ_JS + C(35)*@ISPERIOD("1986")*YYCZ_JS + C(36)*@ISPERIOD("1987")*YYCZ_JS + C(37)*@ISPERIOD("1988")*YYCZ_JS + C(38)*@ISPERIOD("1989")*YYCZ_JS + C(39)*@ISPERIOD("1990")*YYCZ_JS + C(40)*@ISPERIOD("1991")*YYCZ_JS + C(41)*@ISPERIOD("1992")*YYCZ_JS + C(42)*@ISPERIOD("1993")*YYCZ_JS + C(43)*@ISPERIOD("1994")*YYCZ_JS + C(44)*@ISPERIOD("1995")*YYCZ_JS + C(45)*@ISPERIOD("1996")*YYCZ_JS + C(46)*@ISPERIOD("1997")*YYCZ_JS + C(47)*@ISPERIOD("1998")*YYCZ_JS + C(48)*@ISPERIOD("1999")*YYCZ_JS + C(49)*@ISPERIOD("2000")*YYCZ_JS + C(50)*@ISPERIOD("2001")*YYCZ_JS + C(51)*@ISPERIOD("2002")*YYCZ_JS + C(52)*@ISPERIOD("2003")*YYCZ_JS + C(53)*@ISPERIOD("2004")*YYCZ_JS + C(54)*@ISPERIOD("2005")*YYCZ_JS + C(55)*@ISPERIOD("2006")*YYCZ_JS + C(56)*@ISPERIOD("2007")*YYCZ_JS + C(57)*@ISPERIOD("2008")*YYCZ_JS

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关键词：Presentation Presentatio represent Present 固定效应模型 模型 如何

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