<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/"><channel><title>经济学 on Blog</title><link>https://icelemon.top/tags/%E7%BB%8F%E6%B5%8E%E5%AD%A6/</link><description>Recent content in 经济学 on Blog</description><generator>Hugo</generator><language>zh-CN</language><lastBuildDate>Thu, 29 Oct 2026 21:30:00 +0800</lastBuildDate><atom:link href="https://icelemon.top/tags/%E7%BB%8F%E6%B5%8E%E5%AD%A6/index.xml" rel="self" type="application/rss+xml"/><item><title>第二件半价，真正多花的是多少钱</title><link>https://icelemon.top/knowledge/thinking-at-the-margin/</link><pubDate>Thu, 29 Oct 2026 21:30:00 +0800</pubDate><guid>https://icelemon.top/knowledge/thinking-at-the-margin/</guid><description>从20元的汉堡和10元的第二件，分清平均价格、边际成本与边际效用，再把增量比较用于时间选择。</description></item><item><title>好东西为什么会退出市场：从两条旧船理解逆向选择</title><link>https://icelemon.top/knowledge/lemons-market-and-hidden-quality/</link><pubDate>Sat, 24 Oct 2026 06:37:00 +0800</pubDate><guid>https://icelemon.top/knowledge/lemons-market-and-hidden-quality/</guid><description>买方看不清质量时，一次看似谨慎的压价，怎样改变接下来愿意出售的商品。</description></item><item><title>拍卖赢了，为什么反而可能买贵</title><link>https://icelemon.top/knowledge/winners-curse-in-auctions/</link><pubDate>Thu, 22 Oct 2026 10:04:00 +0800</pubDate><guid>https://icelemon.top/knowledge/winners-curse-in-auctions/</guid><description>当大家都在猜同一件东西值多少钱，最高估价怎样更容易被挑出来。</description></item></channel></rss>