在研究跨时期的食品购买时,商品完全替代的假设是否仍然有效?Would the assumption that goods are perfect substitutes be valid in a study of inter temporal food purchases?
在研究跨时期的食品购买时,商品完全替代的假设是否仍然有效?Would the assumption that goods are perfect substitutes be valid in a study of inter temporal food purchases?