生產(chǎn)者理論知識(shí)(ppt55頁)-展示頁
2025-02-22 18:19本頁面
【正文】 to maximise P :=P Q S wi zi m i=1 Q ? G(z) ...subject to the production constraint... Q ? 0 z ? 0 ...and some pretty obvious conditions: zm = `zm With side condition(s) ~ {zm =`zm } C(w, Q,`zm ) := min S wi zi The solution now involves the short run cost function Side constraint in short run Compare this to the solution without the side constraint.... C(w, Q) := min S wi zi ? C(w, Q,`zm ) ~ By definition... So therefore... ~ C(w, Q) C(w, Q, `zm ) _______ ___________ ? Q Q Let’s look at the graphic... P Q C/Q Q _ ~ C/Q Average cost in the short and the long run P Q CQ ~ Q _ CQ Marginal cost in the short and the long run Relationships between the short and the long run Q _ P Q C/Q ~ CQ ~ C/Q CQ Short run Long run The supply curve is steeper in the short run H1(w,Q ,`zm) ~ z 1 w 1 H1(w,Q) Short run Long run So too is the conditional demand curve the firm You must remember this... Basic functional relations Hi(w, S(w,P)) = Di(w,P) demand for input i, conditional on output supply of output demand for input i (unconditional ) Di(w,P) Hi(w,Q) S (w,P) And they all hook together like this 演講完畢，謝謝觀看！ 。s lemma And so... Ci(w, Q) = Hi(w, Q) i ? ___ ?wj Now let39。 input demands market prices How it works... ?Use the fact that the firm is an optimiser ?Behaviour can be predicted by necessary and sufficient conditions for optimum ?The FOC can be solved to yield behavioural response functions. ?Their properties derive from the solution function The firm as a “black box” The Firm Production Output Supply Ordin
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