11.2 Classical Economic Growth Theory ⊙ Presumption2 . o Technology progress can be expressed by the “ Effective Labor units” Et: Effective Labor Units a technology progress coefficient Et=le at o getout 们e(S+2 复表经济学院11.2 Classical Economic Growth Theory  Presumption 2 ❖ Technology progress can be expressed by the “Effective Labor Units”；  Et ： Effective Labor Units；  ：technology progress coefficient g t 0 g t t 0 t t t L L L e L e e E L e ( )   + = = = 