期刊：
Frontiers in Environmental Science,2023年11:1200171 ISSN：2296-665X
通讯作者：
Wu, Q
作者机构：
[Li, Shaojie] Cent China Normal Univ, Hubei Inst Econ & Social Dev, Wuhan, Peoples R China.;[Wang, Duoduo] Jiujiang Vocat Univ, Coll Agr Econ & Technol, Jiujiang, Peoples R China.;[Wu, Qin] Cent China Normal Univ, Sch Publ Adm, Wuhan, Peoples R China.
通讯机构：
[Wu, Q ] C;Cent China Normal Univ, Sch Publ Adm, Wuhan, Peoples R China.
关键词：
ecological civilization pilot demonstration area;urban land green use efficiency;multi-period PSM-DID model;Policy spillover;Spatial heterogeneity
摘要：
Improvement of urban land green use efficiency (ULGUE) in the context of sustained economic growth is a major challenge for the regional sustainable development and ecological civilization construction in China. This study measures the ULGUE of 263 cities in China at the prefecture or above level, clarifies its spatio-temporal changes, investigates the effect of ecological civilization pilot demonstration area construction on ULGUE with the multi-period PSM-DID model and spatial Durbin difference model, and evaluates the spatial spillover effect of the policy. The results show that: 1) In terms of spatio-temporal changes, ULGUE shows a steady upward trend with time. From 2006 to 2019, the national mean value of ULGUE increases from 0.5284 to 0.6439, with an increase rate of 21.86%; in the spatial dimension, ULGUE is characterized by a pattern of eastern > national > central > western. 2) Ecological civilization pilot demonstration area construction has significantly improved the ULGUE of pilot cities by about 0.12% relative to that of non-pilot cities, which was validated by the robustness test. 3) Ecological civilization pilot demonstration area construction has significant positive spillover effects on the ULGUE of neighboring cities, which are related to the urban characteristics such as geographical location, resource endowment, and environmental protection intensity. 4) Ecological civilization pilot demonstration area construction has certain heterogeneity in its effect on ULGUE in different regions and cities, with a more significant promoting effect for non-eastern regions, non-resource-based cities, and non-key cities of environmental protection. Therefore, it is necessary to summarize the successful experience of ecological civilization pilot demonstration area construction and fully consider differential policies, so as to maximize the policy dividends while strengthening regional linkage, and further contribute to national popularization of this policy.
作者机构：
[Zheng, Wensheng; Wang, Xiaofang; Kuang, Aiping; Chen, Jing] Cent China Normal Univ, Key Lab Geog Proc Anal & Simulat Hubei Prov, Wuhan 430079, Peoples R China.;[Zheng, Wensheng] Acad Wuhan Metropolitan Area, Hubei Dev & Reform Commiss, Wuhan 430079, Peoples R China.;[Zheng, Wensheng] Cent China Normal Univ, Wuhan 430079, Peoples R China.;[Zheng, Wensheng] Cent China Normal Univ, Hubei Inst Econ & Social Dev, Wuhan 430079, Peoples R China.;[Wang, Xiaofang] Cent China Normal Univ, China Tourism Acad, Wuhan Branch, Wuhan 430079, Peoples R China.
通讯机构：
[Wang, Xiaofang] C;Cent China Normal Univ, Key Lab Geog Proc Anal & Simulat Hubei Prov, Wuhan 430079, Peoples R China.;Cent China Normal Univ, China Tourism Acad, Wuhan Branch, Wuhan 430079, Peoples R China.
作者机构：
[Luo, Liqun; Ding, Rui; Gao, Xiali; Zhao, Wei] Cent China Normal Univ, Dept Sociol, Wuhan, Peoples R China;[Sun, Jingjing] Cent China Normal Univ, Hubei Inst Econ & Social Dev, Wuhan, Peoples R China
通讯机构：
[Luo, Liqun] C;Cent China Normal Univ, Dept Sociol, Wuhan, Peoples R China.
关键词：
Offspring sex ratio;Peasants;Socioeconomic status;Trivers-Willard hypothesis
摘要：
According to the logic of the Trivers-Willard hypothesis, in a human population, if socioeconomic status is transmitted across generations to some extent, and if sons of high-status parents tend to have higher reproductive success than daughters, while daughters of low-status parents tend to have higher reproductive success than sons, then we should expect that offspring sex ratio is positively associated with socioeconomic status. This study examines whether the assumptions and prediction of this hypothesis apply to a rural population in northern China. Results show that (1) current family socioeconomic status is positively related to family head's father's socioeconomic status in around 1950, (2) low-status family heads have more grandchildren through their daughters than their sons, whereas high-or middle-status family heads have more grandchildren through sons, and (3) as family heads' status increases, they tend to produce a higher offspring sex ratio. Therefore, the assumptions and prediction of the hypothesis are met in the study population. These results are discussed in reference to past studies on sex ratio manipulation among humans.
