- 1、本文档共15页,可阅读全部内容。
- 2、有哪些信誉好的足球投注网站(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
- 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
查看更多
生产率与效率lecture7--参数方法讲述
Productivity Analysis Principles For simplicity, assume away joint (multi-output) production. Theoretical model of production in terms of the (single-output) production function y = f(x). Purpose is to estimate f from the data (Y,X). Elements: 1) Specification of empirical model (function form of the production function). 2) Specification of data-generating process (DGP) (error distribution, inefficiencies). 3) Estimation (calibration of model parameters to best fit the data). 1) Specification of production function Select a certain family of functions flexible enough to approximate the true but unknown f. Examples: CD: Translog: Note 1: Translog provides the second-order numerical approximation to an arbitrary function form. Note 2: Additional constraints on parameters can be imposed to enforce particular substitution properties. E.g. CD function exhibits CRS (NIRS, NDRS) if 2) DGP: sources of deviations from f Most generally, it is assumed that deviations from the production function occur for 2 reasons: i) errors, and ii) technical inefficiency. This can be formalized (for firm k) as where vk is the noise term that captures e.g. random measurement errors; TEk is the usual Farrell output efficiency term. (Note: the additive structure preserved by taking logs. E.g. CD 2b) Distribution assumptions A) The noise term: It is typically assumed (following the central limit theorem) that the noise terms B) The inefficiency term: Must be one-sided TEk ? 1 ? uk= - lnTEk ? 0. It is often assumed the transformed inefficiency terms uk are i.i.d. half-normally distributed, i.e. (other one-sided specifications include exponential and gamma distributions) 3) Estimation Traditional approach: Assume away inefficiency (after all, there is no room for that in the world of neoclassical profit maximizing firms). The residual collapses to the noise term, i.e. It is typically assumed (following the central limit theorem) that the noise terms Therefore, the u
您可能关注的文档
最近下载
- 汽轮机直接空冷系统工艺流程.doc
- 《电力设备预防性试验规程》.pdf VIP
- PCB制造各岗位考试试题.pdf VIP
- 中国蛇伤救治指南2024年版解读PPT课件.pptx VIP
- 亲子教育与游戏活动指导(0-3岁婴幼儿):0~1岁婴儿家庭亲子游戏活动指导PPT教学课件.pptx VIP
- 《0~3岁婴幼儿亲子活动设计与指导》项目3 0-1岁婴幼儿亲子活动设计与指导 教学课件.pptx VIP
- 中文版 IEC 61000-4-4-2012_(1-45,92)电磁兼容性 (EMC) — 第 4-4 部分:试验和测量技术 — 电快速瞬变脉冲群抗扰度试验.doc VIP
- 亲子教育与游戏活动指导(0-3岁婴幼儿):2~3岁幼儿家庭亲子游戏活动指导PPT教学课件.pptx VIP
- 某小区代建方案(投标文件)-secret.doc VIP
- 2023-2024学年辽宁省沈阳市郊联体高二(下)期末历史试卷.pdf VIP
文档评论(0)