A.經(jīng)濟(jì)學(xué)家們有時(shí)對經(jīng)濟(jì)的適當(dāng)模型意見不一致;
B.經(jīng)濟(jì)學(xué)家們有時(shí)對經(jīng)濟(jì)的適當(dāng)模型意見一致,但對與模型相關(guān)聯(lián)的特定數(shù)量不一致;
C.經(jīng)濟(jì)學(xué)家們有時(shí)對實(shí)證經(jīng)濟(jì)學(xué)和規(guī)范經(jīng)濟(jì)學(xué)的區(qū)別意見不一致;
D.經(jīng)濟(jì)學(xué)家們有時(shí)對公平與效率的相對重要性意見不一致。