combo 的方法应该是LEI和ecnomic方法的结合吧？

NO.PZ202105270100000203 问题如下 Camcompares her business cycle forecasting approato the approausethe chief economist. Cambases her equity market forecast on a time-series mol using a composite inx of leang incators the key input, wherethe chief economist uses a taileeconometric mol to generate his economic forecasts.scuss strengths anweaknesses of the economic forecasting approaches useCamanthe chief economist. (1)Leang incator-baseapproachStrengths:simple antare available from thirparty. the methocforecast the turning potintWeakness: Little more thbinary result. Cprovi false signal.Overfittein sample.(2)Economic forecasting approachesStrengths: The mol crobust.Quantative estimation. Impose consistenon analysis.Weakness:False sense of precion. Complex antime-consuming. Can't precting the turning points.

NO.PZ202105270100000203 问题如下 Camcompares her business cycle forecasting approato the approausethe chief economist. Cambases her equity market forecast on a time-series mol using a composite inx of leang incators the key input, wherethe chief economist uses a taileeconometric mol to generate his economic forecasts.scuss strengths anweaknesses of the economic forecasting approaches useCamanthe chief economist. 如题。

NO.PZ202105270100000203 问题如下 Camcompares her business cycle forecasting approato the approausethe chief economist. Cambases her equity market forecast on a time-series mol using a composite inx of leang incators the key input, wherethe chief economist uses a taileeconometric mol to generate his economic forecasts.scuss strengths anweaknesses of the economic forecasting approaches useCamanthe chief economist. 我的理解是Cambo用了数量模型和LEI模型的结合，所以讨论优缺点时两者都要有吧。

NO.PZ202105270100000203 问题如下 Camcompares her business cycle forecasting approato the approausethe chief economist. Cambases her equity market forecast on a time-series mol using a composite inx of leang incators the key input, wherethe chief economist uses a taileeconometric mol to generate his economic forecasts.scuss strengths anweaknesses of the economic forecasting approaches useCamanthe chief economist. 这句话中 time-series mol 就是数量经济模型吧， 为何答案按照LEI的mol处理？