Data for an evaluation of the effect of the revision of environmental law on air quality in China_2013-2016

1. The Air Quality Comprehensive Index (AQCI) is calculated with the concentration of six pollutants, and higher AQCI indicates worse air quality. This dataset includes monthly AQCI data of 71 cities 2013-2016, collected from the website of the Ministry of Ecology and Environment (http://www.mee.gov.cn/hjzl/dqhj/cskqzlzkyb/). 2. There are two steps to select the official documents representing the implementation of the New Law. The first step is identifying documents relating to air pollution management, and then the second step is selecting documents relating to the New Law, rather than other regulations. We exclude documents before April 2014, documents on particular events (Olympic Games, G20, etc.), and documents following other laws or regulations. Based on whether one document is consistent with the feature of the New Law and whether it claims its legal basis on the New Law, we finally selected 140 documents. The documents were searched from official city government webs, issued by the city government or the Secretary of the city government. Based on the information, four variables were constructed: the Implementation Dummy for Month (equals to one after a city issues the first document), the Number of Documents (accumulated the number of documents for each month in each city), the Duration of Implementation (the months passed after the first document was issued), the Sum of Documents’ Duration (the sum of the duration of each document). 3. Original GDP data is quarterly GDP of each city during 2013-2016 united in 100 million collected from National Bureau of Statistics of China (http://data.stats.gov.cn/easyquery.htm?cn=E0101) and city governments’ statistics bureau webs. This study took one-third of quarterly GDP as monthly GDP of the end month of the quarter and interpolated it assuming that the GDP change of every month is the same. 4. Original population data is the yearly population of each city at the end of 2013, 2014 and 2015 collected from China Statistics Information Web (http://www.tjcn.org/tjgb/). This variable is monthly population interpolated from yearly data, united in 0.01 million. 5. The city-monthly data of precipitation, temperature, vapour press, wind speed, and humidity were derived from CMDSC-China Meteorological Data Service Center (http://data.cma.cn/data/cdcdetail/dataCode/SURF_CLI_CHN_MUL_MON_CES.html). For cities not included in the dataset, we used weather condition data of the nearest observation station. This dataset does not include these data according to the requirement by the CMDSC. For those whose nationality is Chinese can apply it with their citizenship identification.

1. 空气质量综合指数（Air Quality Comprehensive Index, AQCI）以六种污染物的浓度为计算基准，指数越高代表空气质量越差。本数据集涵盖2013-2016年71个城市的月度AQCI数据，采集自生态环境部官方网站（http://www.mee.gov.cn/hjzl/dqhj/cskqzlzkyb/）。
2. 筛选代表新法实施的官方文件共分为两步：第一步识别涉及大气污染治理的文件，第二步筛选指向新法而非其他法规的文件。本研究排除了2014年4月之前的文件、涉及特定事件（如奥运会、G20峰会等）的文件，以及依托其他法律法规制定的文件。结合文件是否符合新法特征、是否以新法作为法律依据两个标准，最终共筛选出140份文件。这些文件均检索自各城市政府官网，由市级政府或市政府秘书长发布。基于上述信息，本研究构建了四类变量：月度实施虚拟变量（城市发布首份相关文件后取值为1）、文件数量（累计各城市各月度的文件总数）、实施时长（自首份文件发布起的累计月数）、文件时长总和（所有单份文件的时长之和）。
3. 原始GDP数据为2013-2016年各城市的季度GDP，单位为亿元，采集自国家统计局官网（http://data.stats.gov.cn/easyquery.htm?cn=E0101）及各城市政府统计局官网。本研究将季度GDP的三分之一作为当季度末月的月度GDP，并假设月度GDP变化幅度一致，以此完成插值处理。
4. 原始人口数据为2013、2014及2015年末各城市的年末总人口，采集自中国统计信息网（http://www.tjcn.org/tjgb/）。本研究通过插值将年度人口数据转换为月度人口数据，单位为0.01百万。
5. 降水、气温、水汽压、风速及湿度的城市月度数据均源自中国气象数据服务中心（China Meteorological Data Service Center, CMDSC）（官网地址：http://data.cma.cn/data/cdcdetail/dataCode/SURF_CLI_CHN_MUL_MON_CES.html）。对于数据集未覆盖的城市，我们采用距离其最近的气象观测站的气象数据。根据中国气象数据服务中心的要求，本数据集未包含上述原始气象数据；中国公民可凭身份证件申请获取原始数据。

搜集汇总

背景与挑战

背景概述

该数据集旨在评估中国环保法修订对空气质量的影响，涵盖2013-2016年71个城市的月度数据。它包括空气质量综合指数（AQCI）、新环保法实施相关的官方文件变量（如实施哑变量和文件数量）、GDP、人口以及气象数据（如降水和温度），数据来源包括生态环境部、国家统计局和中国气象数据服务中心等官方渠道。