Zihan Zhang (张子涵)

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ZZ Blog

26 Oct 2021

Bayer, 2007, A Unified framework for measuring preferences for schools and neighborhoods

Bayer,2007,A Unified framework for measuring preferences for schools and neighborhoods Published on JPE. Paper My slides. Conclusion about findings: First,...

18 Oct 2021

The Poverty in Greece

Slides Link Here.

05 Oct 2021

一个行为模型的结构化估计:动态离散选择模型及应用(1)

一个行为模型的结构化估计:动态离散选择模型及应用(1) 2021-10-05 这一篇笔记参考的文献是劳动经济学手册卷4A的第四章,主要介绍了离散选择的动态规划(DCDP)模型的结构化估计方法,并且列举了很多该模型在一些经典劳动经济学问题中的应用,还一并提供了很多经典模型的例子作为参考。这一篇笔记介绍的是离散选择模型的基本框架,和在静态的离散选择模型中的实证的基本结构。其他部分会在后续的笔记中涉及。 离散选择问题的“隐变量框架” (Latent variable framework) 概括来说,离散选择模型的建模思想是模拟人做选择的过程,所以它可以视为一个行为模型。而选择的空间需要是离散的。因此借助效用的概念,如果我们看到一个人在某一个时间上选择了某一个选项,这就代表着对这个人来说,选择这一项的效用更高。所以这个时候就涉及到了不同潜在选择对应的效用的比较。而这种比较就涉及到了隐变量,因为这个人不可能在同一个时间有不一样的选择。 比如举个例子,假设有个人 \(i\) 在时间\(t = 1,...,T\) 做选择要不要结婚,因此他的选择就是 \(d_{i t} \in\{0,1\}\)。那么他的决策就取决于一个隐变量 \(v_{it}^{*}\) , 这个隐变量描述是他两种潜在选择的效用之差。如果有\(v_{it}^*>0\)...

27 Jul 2021

Modeling the Air Pollution in China -- Based on Gaussian Process

Modeling the Air Pollution in China – Based on Gaussian Process Abstract The Gaussian Process (GP) is a powerful model...

20 Jul 2021

A Web Crawler for Basic information of articles in Top 5 Econ Journals.

A Web Crawler for Basic information of articles in Top 5 Econ Journals. There are five top English journals in...

01 Nov 2020

Additive Models

Additive Models Slides of Additive Models, present on WISER club machine learning group on Nov.1, 2022.

04 Dec 2019

Artuç,et al.(2010),Trade Shocks and Labor Adjustment A Structural Empirical Approach

Artuç, Chaudhuri and Mclaren - Trade Shocks and Labor Adjustment: A Structural Empirical Approach (2010) ​ 这篇文章探究的主要问题是贸易解放(Trade Liberalization) 等贸易政策变化 (Trade...

27 Nov 2019

Random Utility Framework and Generalized Linear Models

A Note on Random Utility Framework and Generalized Linear Models 1. Random Utility Framework, Logit and Probit Suppose “i” individuals...

16 Oct 2019

RCK Model

Chap 2 ,Part A - Ramsey-Cass-Koopmans Model 0. 写在前面 In this model, saving rate is no longer exogenous, in other...

01 Oct 2019

Solow Growth Model

Chap-1 Solow Growth model Given by Prof. Jaehone Kim, Tue & Thu 19.00-21.00 @学生公寓105 10% Assignments and Quizzes. 40% Midterm...