首页
分类
排行榜
推荐
书架
笔记
问 AI
首页
›
斫琴牧童40
斫琴牧童40
8小时前 加入
·
10 条公开笔记 · 1 个组
私信
最近在读
斯坦福极简经济学
笔记组
共 1 组
斯坦福极简经济学
10 条
所有成本都是机会成本（opportunity cost）。当你做一个选择时，你没有选择的东西就是经济学家所谓的“机会成本”
《斯坦福极简经济学》
7小时前
%20by%20%E2%80%9ELisa%20Wischofsky%E2%80%9D%2C%20licensed%20under%20%E2%80%9ECC0%201.0%E2%80%9D%20(https%3A%2F%2Fcreativecommons.org%2Fpublicdomain%2Fzero%2F1.0%2F)%3C%2Fdc%3Arights%3E%3C%2Frdf%3ADescription%3E%3C%2Frdf%3ARDF%3E%3C%2Fmetadata%3E%3Cmask%20id%3D%22viewboxMask%22%3E%3Crect%20width%3D%22980%22%20height%3D%22980%22%20rx%3D%220%22%20ry%3D%220%22%20x%3D%220%22%20y%3D%220%22%20fill%3D%22%23fff%22%20%2F%3E%3C%2Fmask%3E%3Cg%20mask%3D%22url(%23viewboxMask)%22%3E%3Crect%20fill%3D%22%23D9BC8C%22%20width%3D%22980%22%20height%3D%22980%22%20x%3D%220%22%20y%3D%220%22%20%2F%3E%3Cg%20transform%3D%22translate(10%20-60)%22%3E%3Cpath%20fill-rule%3D%22evenodd%22%20clip-rule%3D%22evenodd%22%20d%3D%22m448%20193%2015%202%209%202c9%201%2017%203%2025%207%208-4%2018-6%2027-7a148%20148%200%200%201%2077%2014%20125%20125%200%200%201%2045%2033l19%204c11%204%2022%209%2032%2016%2010%209%2018%2020%2024%2032l6%2017%201%204v2a232%20232%200%200%200%2034%2070c7%2010%2014%2021%2019%2032%206%2012%2011%2025%209%2039-1%2013-6%2025-16%2034l-3%2015c-4%2011-10%2023-20%2031%203%206%206%2012%207%2019%202%2015%200%2031-7%2045-2%203-4%204-7%205l-1-8-1-5c-2-14-11-27-21-37a47%2047%200%200%201-9%2045c-7%209-18%2016-28%2022-5%202-10%204-15%202l-2-3c-1-2-3-3-3-5-2-7-2-15-2-23v-6c0-16%202-31%204-47-10-4-18-12-24-21-9-12-12-26-13-41-2-30%206-60%2025-84l-6-5-4-4c-18-15-26-35-32-57-3-12-4-26%200-37-4%200-9-1-10-5-1-7%203-14%207-19l-13%207-5%202-10%206c-6%203-12%207-19%209-2%201-4-1-6-2l-5-3c-13-9-26-17-40-23%203%204%206%209%206%2014-1%203-1%206-4%207l-13-1-5-1h-28c-8%2019-12%2038-16%2058a532%20532%200%200%201-29%2091c-8%2017-19%2032-32%2046-8%208-16%2014-25%2020%2018%2011%2030%2028%2039%2046%2017%2033%2029%2068%2031%20105%201%2019-3%2038-11%2055-5%2013-16%2024-29%2030-8%204-18%205-27%205-8-1-15-4-21-8a76%2076%200%200%200-40%207l-1%201c-4%203-8%205-11%2010-5%206-8%2013-10%2021v1c0%202%200%203-2%203-3-5-4-11-4-17%200-9%205-17%209-25l12-11c-5-2-10-5-14-9a69%2069%200%200%201-22-38c-5%201-10%202-15%201-16-1-31-8-42-19-6-6-12-14-16-22l-3-3-2-1-14-17c-9-15-14-33-13-51s6-36%2016-51l11-11c-7-13-12-28-12-43v-12a101%20101%200%200%201%2027-123c10-9%2022-17%2035-18%2014-22%2030-43%2049-60a235%20235%200%200%201%2096-49c22-6%2044-7%2067-5Zm224%2072c13%207%2025%2016%2032%2029%205%2011%207%2022%2010%2033l5%2020a175%20175%200%200%200%2027%2050c8%2012%2016%2024%2022%2036%204%2010%206%2021%204%2032l-7-22c-6-15-14-27-22-41l-1-2-9-12-1-1-6-10-7-10-1-6-1-2a168%20168%200%200%200-45-94Zm-224%2046%2010-25c-14%201-27%203-41%206-8%2015-15%2029-20%2046-6%2023-7%2047-9%2070v6c-1%2018-3%2036-8%2053a201%20201%200%200%200%2047-86l10-32%2010-36%201-2Zm-218%207-11%2029v1l-1%203c-18%2018-31%2044-38%2069a90%2090%200%200%201%2027-86c7-6%2015-12%2023-16Zm-52%20220c3-10%208-19%2015-27l-9%209a88%2088%200%200%200-6%2084l-3-27c-1-13-1-26%203-39Z%22%20fill%3D%22%23000000%22%2F%3E%3Cpath%20d%3D%22M495%20231a231%20231%200%200%201%20219%20204c1%2010%202%2021%200%2030-1%204-1%207-4%208-3-10-3-19-4-29a220%20220%200%200%200-239-205c-42%204-83%2019-117%2044l-17%2013a221%20221%200%200%200-78%20164c0%2023%207%2043%2015%2064h17c3%201%204%204%202%206l-6%202c-15%201-31%207-42%2017-8%209-14%2019-16%2031-3%2015%200%2032%208%2045%209%2015%2024%2027%2040%2033%2014%205%2029%207%2043%205%204-1%208-2%2011%200v3c-5%205-11%206-18%207-16%203-33-1-47-8a86%2086%200%200%201-47-58c-4-18-1-37%209-53%208-12%2020-21%2034-26-7-14-10-28-12-43-2-18-2-35%200-53%201-13%204-25%208-38a227%20227%200%200%201%2099-122c41-28%2092-43%20142-41Z%22%20fill%3D%22%23000%22%2F%3E%3Cpath%20d%3D%22M535%20244a220%20220%200%200%201%20171%20200c1%2010%201%2019%204%2029l-2%2018v22c-3%204-4%209-4%2014-2%208-2%2015-2%2023v65c0%2021-3%2042-11%2061-4%2013-10%2024-18%2035-10%2012-21%2022-34%2031-11%209-24%2017-37%2024l-22%2014-12%208%209-2c-3%2011-3%2024-4%2036%200%208%201%2016%207%2022a235%20235%200%200%200%2081%2045c6%207%2011%2016%2013%2025%201%209%200%2018-4%2027-6%2010-14%2018-23%2024-13%2010-28%2017-43%2022a417%20417%200%200%201-217%2011c-16-3-33-9-48-17-10-5-21-12-28-21-6-6-10-14-11-22-2-10%200-21%205-30%2021-13%2039-32%2049-54%205-11%207-22%208-34%201-16%200-32-1-47-2-20-3-41-8-61%2011%2012%2023%2024%2037%2032%2017%2011%2036%2020%2055%2026%2020%207%2041%2013%2063%2018l25%203c3%200%206%200%208-2%202-1%201-2%202-3l-17-2c-29-7-58-16-87-27-18-7-36-15-53-27-18-13-33-30-47-47l-11-16-1-1v-3c-3-2-7-1-11%200-14%202-29%200-43-5-16-6-31-18-40-33-8-13-11-30-8-45%202-12%208-22%2016-31%2011-10%2027-16%2042-17l6-2c2-2%201-5-2-6h-17c-8-21-15-41-15-64-1-14%202-27%205-41a221%20221%200%200%201%2073-123l17-13a230%20230%200%200%201%20185-39Z%22%20fill%3D%22%23ffffff%22%2F%3E%3Cpath%20d%3D%22M708%20513c3%203%202%207%203%2012v29c0%2026%202%2054%200%2080-3%2031-14%2063-36%2086-25%2028-57%2051-93%2064l2%207v35c1%206%204%2010%208%2014l26%2019%2032%2020%2024%2012c2%200%203%201%205%203l-19-5c-19-6-37-14-54-25-9-5-19-12-26-20-6-6-7-14-7-22%201-12%201-25%204-36l-9%202%2012-8%2022-14c13-7%2026-15%2037-24%2013-9%2024-19%2034-31a178%20178%200%200%200%2029-96v-65c0-8%200-15%202-23%200-5%201-10%204-14ZM278%20574c5%205%204%2014%200%2019l-3%207c1%203%205%205%207%206%206%203%2012%207%2019%209%200%204-3%205-7%205-6-1-13-3-18-6-7-3-13-8-13-16%200-6%205-9%206-14%202-4%200-7-1-11%204-1%207-2%2010%201ZM328%20667l11%2016c14%2017%2029%2034%2047%2047%2017%2012%2035%2020%2053%2027a714%20714%200%200%200%20104%2029c-1%201%200%202-2%203-2%202-5%202-8%202l-25-3a478%20478%200%200%201-118-44c-14-8-26-20-37-32%205%2020%206%2041%208%2061%201%2015%202%2031%201%2047-1%2012-3%2023-8%2034-10%2022-28%2041-49%2054l-14%208c2-4%206-6%209-9%2013-11%2024-25%2034-39%206-10%2012-21%2014-33%204-19%203-39%203-58l-3-59%202-10c-10-11-19-26-22-41Z%22%20fill%3D%22%23000%22%2F%3E%3Cpath%20d%3D%22M685%20500c2%200%205%200%206%202s-1%204-3%205l-19%2010%2011-1c4-1%207%200%2010%203s3%207%201%2010c-1%203-4%205-8%205-16%200-32%203-47%207-4%202-7%202-11%200-4-3-5-9-2-13%203-3%207-3%2011-6%2012-7%2025-11%2037-17l14-5ZM428%20501c20%201%2038%208%2057%2014l30%2011c6%201%2011%201%2015%206%203%205%200%2011-5%2012-8%202-18-1-27-2-27-2-53-9-79-13-8-1-16-1-23-5-1-1-4-2-3-4%202-4%206-7%2010-9%207-2%2015%200%2022%201%2012%201%2023%204%2034%206l-25-8-15-4v-4l9-1Z%22%20fill%3D%22%23000000%22%2F%3E%3Cg%20fill%3D%22%23000000%22%3E%3Cpath%20d%3D%22M675%20381c5%200%208%204%209%208-11%203-23%208-34%2013l-16%208c-7%204-14%207-22%209-5%201-9%200-13%203l-7%208c-3%203-4%207-6%2012-1-1-3-2-3-4-2-5%200-11%202-16%202-6%203-12%208-17%203-4%205-8%209-10%204-3%2010-4%2014%200l1%206%2025-14c11-4%2021-8%2033-6ZM481%20383c14%202%2032%201%2044%207%209%204%2013%2011%2018%2019l-1%204c-4%203-9%204-14%202-4-2-6-6-9-8-2-2-5-2-8-3l-25-2c-12-1-24-6-36-7l-27-5-5-2c9-3%2019-4%2029-5%2011%200%2023-2%2034%200Z%22%2F%3E%3Cpath%20d%3D%22M540%20387c6-2%2012-2%2016%202%206%203%209%209%2011%2015%200-4%202-9%205-12%206%203%2011%209%2013%2015%201%205%202%2010%200%2015s-9%208-13%205c-4-4-4-12-5-18-1%204-2%208-5%2010s-7%201-9-2l-5-12-7-15-1-3Z%22%2F%3E%3C%2Fg%3E%3Cpath%20d%3D%22M216%20569c5%200%2010-1%2014%202%203%202%205%205%204%209-2%204-6%207-11%207h-16c-5-1-9-3-11-7-1-4%202-7%205-9%205-2%2010-1%2015-2ZM229%20592c3%201%207%203%207%207%200%203-1%206-4%207-5%204-11%204-17%206-5%201-10%202-14-1s-3-9%200-12c4-4%208-4%2013-5s10-3%2015-2ZM301%20644h8c3%201%206%204%206%208%200%205-4%209-9%2010-5%202-9-2-11-6-1-5%201-11%206-12Z%22%20fill%3D%22%23000000%22%2F%3E%3Cpath%20d%3D%22m591%20528%202%202%207%2022c4%208%2010%2015%2015%2023%204%206%206%2013%205%2020-1%206-4%2012-9%2016-7%207-16%2012-25%2016-5%203-11%204-17%202l5-4c11-9%2025-14%2036-24%202-2%204-6%204-9-1-7-5-11-8-16-5-9-10-16-13-25-2-7-4-16-2-23Z%22%20fill%3D%22%23000000%22%2F%3E%3Cpath%20d%3D%22m636%20651-7%208-17%2016c-9%2010-19%2018-32%2022-18%206-38%204-57%200-10-3-21-7-31-13l-6-5c0-3%202-4%204-4l17%205%2033-4c13-2%2027-3%2039%200l5-1%2019-8c4-2%208-3%2013-3%206-4%2013-10%2020-13Z%22%20fill%3D%22%23000000%22%2F%3E%3Cpath%20fill-rule%3D%22evenodd%22%20clip-rule%3D%22evenodd%22%20d%3D%22M468%20196a218%20218%200%200%200-234%20122%20323%20323%200%200%200-25%20186l4%2019c1%203%203%206%205%206l4%201h1c5%206%2012%2010%2020%2012%2012%204%2026%204%2038%202-3%2016%201%2034%207%2049%205%2012%2013%2025%2023%2034a67%2067%200%200%200%2051%2014c5-1%209-4%2013-8v-1l2-5h-3c-3%200-5%200-8-2-11-6-19-17-25-28-10-20-15-43-15-65%2013-6%2024-16%2033-27l7-5%204-2c9-6%2017-14%2025-22%2017-20%2030-43%2039-67a443%20443%200%200%200%2016-63c4-20%208-41%2017-60a185%20185%200%200%201%2034%201l12%201c3-1%204-4%204-7%200-5-3-10-6-14a272%20272%200%200%201%2045%2026c2%202%205%203%207%202a172%20172%200%200%200%2026-13l6-4%2014-7c-3%205-7%2012-7%2018%200%203%203%205%206%205%2011%201%2021-1%2032-4l4-1c4-1%208%202%2011%204%209%209%2015%2022%2016%2034a118%20118%200%200%201%200%2035l-1%2011-1%2015-2%2037c2%2016%208%2032%2020%2043%209%209%2022%2012%2034%209%206-2%2012-6%2016-10%205-4%207-9%207-16l-11%204-14%204v-8c4-3%208-7%2010-11l-2-9-1-7-3-23-3-25-1-7c-2-14-4-27-9-41a162%20162%200%200%200-42-68c-6-4-11-7-18-9a136%20136%200%200%200-39-36c-17-8-34-14-52-17-15-2-32-3-46%201l-16%205c-9-4-19-6-29-8Zm-20%20115c3-8%205-17%2010-25-14%201-27%203-41%206-7%2013-14%2027-18%2041a232%20232%200%200%200-10%2071c-2%2021-3%2043-9%2063%2019-20%2034-45%2042-71%206-15%2010-30%2014-46%204-13%207-26%2012-38v-1Z%22%20fill%3D%22%23000000%22%2F%3E%3C%2Fg%3E%3Cg%20transform%3D%22translate(10%20-60)%22%3E%3C%2Fg%3E%3C%2Fg%3E%3C%2Fsvg%3E)
