<?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>边际分析 on Blog</title><link>https://icelemon.top/tags/%E8%BE%B9%E9%99%85%E5%88%86%E6%9E%90/</link><description>Recent content in 边际分析 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/%E8%BE%B9%E9%99%85%E5%88%86%E6%9E%90/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></channel></rss>