房建工程地基基础施工关键技术探究

地基处理技术是近年来我国房屋建筑工程施工中一种较常见的施工处理技术,多见于房屋建筑工程中的软土地基施工环节。通过以往的房屋建筑经验,如果直接在软土地基上进行建筑施工,地基区域软土很容易会影响房屋建筑工程的稳定性,所以,在针对这一部分软土区域的施工环节,需要针对拟施工的地基软土区域进行处理,提升其软土的稳定性。到目前,地基处理技术已经在我国房屋建筑工程施工中广泛应用,这一技术应用过程中存在的不足也逐渐凸显,如何针对这一技术的不足予以完善,以此提升地基处理技术对房屋建筑质量的积极影响,成为了现阶段房屋建筑地基基础施工质量提升的重要环节之一。     

Debt Overhang and Deleveraging in the US Household Sector: Gauging the Impact on Consumption

Using a novel data set for the U.S. states, this paper examines whether household debt and the protracted debt deleveraging help explain the dismal performance of U.S. consumption since 2007 in the aftermath of the housing bubble. By separating the concepts of deleveraging and debt overhang—a flow and a stock effect—we find that excessive indebtedness exerted a meaningful drag on consumption over and beyond wealth and income effects. The overall effect, however, is modest—‐around one sixth of the slowdown in consumption between 2000–06 and 2007–12—and mostly driven by states with particularly large imbalances in their household sector. This might be indicative of non‐linearities, whereby indebtedness begins to bite only when misalignments from sustainable debt dynamics become excessive.     

New Geographies of Residential Capitalism: Financialization of the Turkish Housing Market Since the Early 2000s

The post‐2001 financial crisis era in Turkey gave rise to twin booms in housing construction and credit markets, both of which suffered from the subsequent debt crisis. The financial transformation of the economy in conjunction with state‐led urban legislation reform had significant effects on the housing market in terms of commodification of housing, countrywide construction activities and substantial increases in household debt and construction company loans. The changing role and function of the state as a direct provider of housing can be regarded as actually existing neoliberalism providing favourable conditions for financialization, as it ushered in the commodification of housing. The Turkish government, together with the government‐backed housing agency, metropolitan municipalities and publicly owned real‐estate investment company, has been active in nationwide housing construction and urban regeneration projects. This article argues that there is a lack of synchrony between the commodification of housing and the financialization of the household sector owing to the institutional setting of the mortgage system and structural macroeconomic problems. Rather, housing commodification has been accompanied by the financialization of the corporate sector through a steep rise in the external debt burden of construction companies.     

组合式房产税改革的宏观经济效应 ——兼顾居民用房与商业用房的DSGE框架分析

本文通过构建包含房产税的动态随机一般均衡（DSGE）框架，兼顾居民用房与商业用房，模拟分析房产税改革对主要宏观经济变量的影响。研究结果表明：（1）提高居民用房房产税税率对总消费、投资、房价和总产出等变量的均衡值和波动均以负面影响为主，但会降低社会福利损失；（2）降低商业用房房产税税率对总消费、投资、房价和总产出等变量的均衡值和波动均以正面影响为主，但会提高社会福利损失；（3）提高居民用房房产税税率与降低商业用房房产税税率同时实施时，不仅能够对冲居民用房房产税改革对宏观经济的负面影响，尤其是能够有效对冲改革对投资和总产出的负面影响，还会降低社会福利损失。因此，中国下一步试点改革应当重点关注组合式改革方案。     

Excessive Financial Support,Real Estate Development and Macroeconomic Growth: Evidence from China

ABSTRACT

Using monthly panel data for China’s 30 provinces from 2007 to 2017, this article analyzes how level of financial support affects the interplay between real estate development and macroeconomic growth. Based on a threshold model, the results suggest that housing price increases substantially impede economic growth, but there is no significant threshold effect for the sample as a whole. On investigating regional cross-sectional variations, we found that local economic situation clearly impacts on this effect, with significant threshold effects detected in subsamples. While housing price may have positive influences on economic growth in the mid-west subgroup with appropriate financial support, more developed regions returned contrary results.     

Hen housing system information effects on U.S. egg demand

The U.S. egg industry has been moving rapidly towards “cage-free” aviary housing as an alternative to conventional cages for hens. A choice experiment was used to evaluate the U.S. public’s willingness to pay (WTP) for egg attributes including housing system, color, size, and certifying agency. A significant difference in WTP for hen housing systems was found using video information treatments describing hen housing systems. When respondents were shown videos of egg production systems, they were indifferent between cage-free aviary and the alternative enriched colony hen housing system whereas with no video information the respondents clearly preferred the cage-free system. Results point towards potential public misunderstanding of the costs and benefits associated with the “cage-free” egg label designation and highlight potential discrepancies between industry commitments and informed consumer preferences.     

Being Good Parents or Being Good Citizens: Dilemmas and Contradictions of Urban Families in Middle‐Class Enclaves and Mixed Neighbourhoods in Germany

In recent years, cities have become ever more attractive to middle‐class families. On the one hand, middle‐class families tend to withdraw into (often newly built) socially homogeneous middle‐class neighbourhoods. On the other hand, they are also known to move into inner‐city and socially mixed areas, thus triggering processes of gentrification. Academic literature has often denounced these housing choices as being either ‘separatist’ or ‘revanchist’, more broadly categorized as strategies of ‘middle‐class disaffiliation’. Although there is a grain of truth in these interpretations, the reality is certainly more complicated. In our research on middle‐class parents’ housing and neighbourhood choices as well as their patterns of neighbourhood use, carried out in each of the two types of residential area mentioned above, we have only very rarely found an explicit desire to draw boundaries that exclude those ‘beneath’ them. We rather argue that the housing choices and neighbourhood‐related activities of middle‐class family households are heavily influenced by the specific dilemmas the interviewees face as (working) urban parents. While a significant number of respondents worry about the social sustainability, justice and cohesion of urban society, they are also concerned about the future prospects of their children. Many find it difficult to reconcile these conflicting normative demands under the prevailing circumstances.     

Depreciation of Business R&D Capital

We develop a forward-looking profit model to estimate the depreciation rates of business R&D capital. By using U.S. government data between 1987 and 2007, and the newly developed model, we estimate both constant and time-varying industry-specific R&D depreciation rates. The results comprise a set of R&D depreciation rates for major U.S. high-tech industries. They align with the main conclusions from recent studies that the rates are in general higher than the traditionally assumed 15 percent and vary across industries. The relative ranking of the constant R&D depreciation rates among industries is consistent with industry observations and the industry-specific time-varying rates are informative about the dynamics of technological change and the levels of competition across industries. Lastly, we also present a cross-country comparison of the R&D depreciation rates between the U.S. and Japan, and find that the results reflect the relative technological competitiveness in key industries.     

Assigning Refugees to Landlords in Sweden: Efficient,Stable, and Maximum Matchings*

In this paper, we investigate the problem of finding housing for refugees once they have been granted asylum. In particular, we demonstrate that market design can play an important role in a partial solution to the problem. More specifically, we investigate a specific matching system, and we propose an easy-to-implement mechanism that finds an efficient, stable, and maximum matching. Such a matching guarantees that housing is efficiently provided to a maximum number of refugees, and that no refugee prefers another specific landlord to their current match when, at the same time, that specific landlord prefers that refugee to their own current match.     

住房公积金导致了不平等吗*——来自中国家庭金融调查的证据

住房公积金制度作为一项政策性住房金融制度，能够缓解家庭购房金融约束、稳定住房金融市场，成为实现“房住不炒”的重要政策工具。本文以2015年实施的住房公积金信贷宽松政策作为外生冲击，从财富效应的角度研究了住房公积金制度对不同家庭购房行为的影响。利用双重差分的实证研究方法，本文发现目前住房公积金主要促进了缴存家庭的多套房需求，加大了缴存家庭与非缴存家庭的住房财富差距。住房信贷政策的针对性与多样性急需提升。