Happiness in the Dual Society of Urban China: Hukou Identity, Horizontal Inequality and Heterogeneous

This paper studies the impact of income inequality on the subjective well-being of different social groups in urban China. We classify urban social groups according to their hukou status: rural migrants, gbornh urban residents, and gacquiredh urban residents who once changed their hukou identity from rural to urban. We focus on how the horizontal inequality-income disparity between migrants and urban residents-affects individual happiness. The main results are as follows. First, migrants suffer from unhappiness when the horizontal inequality increases, but urban residents show a much smaller aversion to the horizontal inequality. Second, migrants will not be happier if their relative incomes within their migrant group increase, while urban residents do become happier when their incomes increase within their groupfs income distribution. Third, gacquiredh urban residents have traits of both migrants and gbornh urban residents. They have an aversion to the horizontal inequality like migrants, and they also favor higher relative income among urban residents. Fourth, gbornh urban residents have lower happiness scores when they are old. People who are Communist Party members strongly dislike the horizontal inequality. Our findings suggest that migrants, gacquiredh urban residents, elderly people and Party members from gbornh urban residents are the potential proponents of social integration policies in urban China.Horizontal inequality, Happiness, Hukou identity, Migration, Social integration

Identity, Inequality, and Happiness: Evidence from Urban China

This paper presents the impact of income inequality on the subjective wellbeing of three different social groups in urban China. We classify urban social groups according to their hukou status: rural migrants, gbornh urban residents, and gacquiredh urban residents who had changed their hukou identity from rural to urban. We focus on how the income disparity between migrants and urban residents affects individual happiness. The main results are as follows. People feel unhappy if inequality is related to their hukou identity, irrespective of whether they are urban residents with or without hukou. However, when identity-related inequality and other individual- and city-level characteristics are controlled, inequality measured by city-level Gini increases happiness. We also find that among urban residents who own hukou, mostly the gacquiredh urban residents are unhappy with hukou-related inequality. This implies that identity is formed by both policy and personal experience. gBornh urban residents have lower happiness scores when they are old. Communist Party members strongly dislike the identity-related inequality.Inequality, Hukou identity, Happiness, Migration, Social integration

How Do Heterogeneous Social Interactions Affect the Peer Effect in Rural-Urban Migration?: Empirical Evidence from China

In this paper, we use the "2002 Chinese Household Income Project Survey" (CHIP2002) data to examine how heterogeneous social interactions affect the peer effect in the rural-urban migration decision in China. We find that the peer effect, measured by the village migration ratio, significantly increases the individual probability of outward migration. We also find that the magnitude of the peer effect is nonlinear, depending on the strength and type of social interactions with other villagers. Interactions in information sharing can increase the magnitude of the peer effect, while interactions in mutual help in labor activities, such as help in housing construction, nursing and farm work in busy seasons, will impede the positive role of the peer effect. Being aware of the simultaneity bias caused by the two-way causality between social interaction strengths and migration, we utilize "historical family political identity in land reform" as an instrumental variable for social interactions. However, the hypothesis that probit and instrumental-variable probit results are not significantly different is not rejected. The existence of a nonlinear peer effect has rich policy implications. For policy makers to encourage rural-urban migration, it is feasible to increase education investment in rural areas or increase information sharing among rural residents. However, only an increase in the constant term in the regression, i.e., a "big push" in improving institutions for migration, can help rural Chinese residents escape the low equilibrium in migration.labor migration, urbanization, peer effect, social interaction, social multiplier

Etimologi perkataan arkaik dalam bahasa Melayu: faktor dan kesan pewujudan kata

Peminjaman kata daripada bahasa rumpun lain telah menambahkan jumlah perbendaharaan Melayu. Pertambahan yang berlaku juga telah mewujudkan kesinoniman kata dan memberi nilai kepada penggunaan sesebuah kata. Walau bagaimanapun, peresapan kosa kata asing yang berterusan telah menyebabkan wujudnya perkataan arkaik. Pewujudan ini bukan hanya berlaku pada kosa kata asli Melayu malah terjadi pada kata yang dipinjam daripada rumpun bahasa lain. Oleh itu, kajian ini akan meneliti lima perkataan arkaik dalam bahasa Melayu dari sudut etimologi. Pemilihan data kajian dibuat berdasarkan penandaan simbol ‘ark’ yang merujuk kepada arkaik menerusi Kamus Dewan Perdana (2020). Selain itu, data terpilih juga dibuat berdasarkan kepada persamaan makna antara perkataan arkaik dengan perkataan pada masa kini. Pembuktian ini penting bagi mengenal pasti kemasukan atau penggunaan sesebuah kata dalam bahasa Melayu dan kemunculannya sebagai kata arkaik sebagaimana yang dicatatkan oleh pengkaji bahasa lain. Selain itu, faktor berlakunya fenomena ini turut dibincangkan dengan menggunakan kerangka pedoman etimologi yang dicadangkan oleh Collins (2003) yang diubah suai oleh Taufiq (2022). Hasil kajian menunjukkan bahawa kata arkaik terhasil menerusi penggantian kata yang lebih menyerlah penggunaannya dalam kalangan penutur bahasa. Selain itu, melalui penelitian kekerapan penggunaan serta kemunculannya menerusi manuskrip Melayu lama, beberapa perkataan yang dikaji juga tidak digunakan dengan meluas pada zamannya. Sekiranya terdapat dua perkataan yang sinonim, masyarakat Melayu lebih memilih perkataan yang difahami oleh masyarakat umum agar mudah untuk berkomunikasi, dan hal ini menyebabkan status perkataan yang dipinggirkan itu berubah menjadi perkataan arkaik

Reservoir Permeability Prediction Based on Analogy and Machine Learning Methods: Field Cases in DLG Block of Jing’an Oilfield, China

AbstractReservoir permeability, generally determined by experimental or well testing methods, is an essential parameter in the oil and gas field development. In this paper, we present a novel analogy and machine learning method to predict reservoir permeability. Firstly, the core test and production data of other 24 blocks (analog blocks) are counted according to the DLG block (target block) of Jing’an Oilfield, and the permeability analogy parameters including porosity, shale content, reservoir thickness, oil saturation, liquid production, and production pressure difference are optimized by Pearson and principal component analysis. Then, the fuzzy matter element method is used to calculate the similarity between the target block and analog blocks. According to the similarity calculation results, reservoir permeability of DLG block is predicted by reservoir engineering method (the relationship between core permeability and porosity of QK-D7 in similar blocks) and machine learning method (random forest, gradient boosting decision tree, light gradient boosting machine, and categorical boosting). By comparing the prediction accuracy of the two methods through the evaluation index determination coefficient (R2) and root mean square error (RMSE), the CatBoost model has higher accuracy in predicting reservoir permeability, with R2 of 0.951 and RMSE of 0.139. Finally, the CatBoost model is selected to predict reservoir permeability of 121 oil wells in the DLG block. This work uses simple logging and production data to quickly and accurately predict reservoir permeability without coring and testing. At the same time, the prediction results are well applied to the formulation of DLG block development technology strategy, which provides a new idea for the application of machine learning to predict oilfield parameters

Ferroelectricity in layered bismuth oxide down to 1 nanometer

Atomic-scale ferroelectrics are of great interest for high-density electronics, particularly field-effect transistors, low-power logic, and nonvolatile memories. We devised a film with a layered structure of bismuth oxide that can stabilize the ferroelectric state down to 1 nanometer through samarium bondage. This film can be grown on a variety of substrates with a cost-effective chemical solution deposition. We observed a standard ferroelectric hysteresis loop down to a thickness of ~1 nanometer. The thin films with thicknesses that range from 1 to 4.56 nanometers possess a relatively large remanent polarization from 17 to 50 microcoulombs per square centimeter. We verified the structure with first-principles calculations, which also pointed to the material being a lone pair-driven ferroelectric material. The structure design of the ultrathin ferroelectric films has great potential for the manufacturing of atomic-scale electronic devices.This work was supported by the National Key Research and Development Program of China (2018YFA0703700, 2017YFE0119700, and 2020YFA0406202), the National Natural Science Foundation of China (21801013, 51774034, 51961135107, 62104140, 12175235, 22090042, 12074016, 11704041, and 12274009), the Fundamental Research Funds for the Central Universities (FRF-IDRY-19-007 and FRF-TP-19-055A2Z), the National Program for Support of Top-notch Young Professionals, the Young Elite Scientists Sponsorship Program by CAST (2019-2021QNRC), and Lingang Laboratory Open Research Fund (grant LG-QS-202202-11). Use of the Beijing Synchrotron Radiation Facility (1W1A beamlines, China) of the Chinese Academy of Sciences is acknowledged. Y.-W.F. acknowledges the support of Masaki Azuma’s group during his stay at the Tokyo Institute of Technology. Y.L. acknowledges the support of the Beijing Innovation Team Building Program (grant no. IDHT20190503), the Beijing Natural Science Foundation (Z210016), the Research and Development Project from the Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering (2022SX-TD001), and the General Program of Science and Technology Development Project of Beijing Municipal Education Commission (KM202110005003).Peer reviewe

Meeting Report: Aging Research and Drug Discovery

Aging is the single largest risk factor for most chronic diseases, and thus possesses large socioeconomic interest to continuously aging societies. Consequently, the field of aging research is expanding alongside a growing focus from the industry and investors in aging research. This year's 8th Annual Aging Research and Drug Discovery ARDD) meeting was organized as a hybrid meeting from August 30th to September 3rd 2021 with more than 130 attendees participating on-site at the Ceremonial Hall at University of Copenhagen, Denmark, and 1800 engaging online. The conference comprised of presentations from 75 speakers focusing on new research in topics including mechanisms of aging and how these can be modulated as well as the use of AI and new standards of practices within aging research. This year, a longevity workshop was included to build stronger connections with the clinical community

Labor Market Reform, Income Inequality and Economic Growth in China

The year 1996 was a turning point both in terms of Chinese labor market reform and in China's economic growth pattern. Before 1996, labor market reform was mainly implemented through adjustment of people's occupation and income structure. Since 1996, employment restructuring has led to differentiation in terms of employment status. Labor market reform in the former stage resulted in slow growth in wages, whereas reform in the latter stage enhanced economic efficiency. Both stages have enabled the Chinese economy to apply its comparative advantage of low labor cost. Labor market reform has also increased income disparity and, therefore, new challenges are posed in sustaining economic growth. China needs to adjust its development strategies and introduce labor market reform that can improve income equality, so as to achieve sustainable economic development. Copyright (c) 2008 The Authors Journal compilation (c) 2008 Institute of World Economics and Politics, Chinese Academy of Social Sciences.