高房价挤出了谁?——基于中国流动人口的微观视角

本文基于2014—2016年中国流动人口动态监测调查数据,考察已经"进入"城市的劳动力家庭是否"住下来",从个人层面研究房价如何影响劳动力家庭的居住决策,发现高房价会增强劳动力家庭的流动意愿,特别是挤出那些没有购房的、高技能水平的劳动力。尽管公共服务对高房价有负向调节作用,挤出效应在大城市表现得尤为显著。进一步地,打算继续流动的劳动力选择流向已购房产所在地的概率更大,而住房的财富效应使得劳动力更倾向于流向其他城市,特别是省会级及以上城市。国家自然科学基金项目(71871195)教育部人文社会科学基金项目(18YJA790121)福建省自然科学基金项目(2016J05106)闽都中小银行教育基金经费的资

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies