李嘉图等价定理的协整检验

李嘉图等价定理认为,政府支出是通过发行国债融资还是税收融资没有任何区别,即债务和税收等价.李嘉图等价定理的理论基础是生命周期假说,而且其成立存在诸多前提条件.通过对我国的居民消费、国债余额、国内生产总值的协整分析,认为李嘉图等价定理在我国并不成立.     

Think national,forecast local: a case study of 71 German urban housing markets

In this article, we examine whether the local indicators are able to predict the city-level housing prices and rents better than national indicators. For this purpose, we assess the forecasting ability of 126 indicators and 21 types of forecast combinations using a sample of 71 large German cities. There are several predictors that are especially useful, namely price-to-rent ratios, national-level business confidence, and consumer surveys. We also find that combinations of individual forecasts are among the top forecasting models. On average, the forecast improvements attain about 20%, measured by a reduction in root mean square error, compared to the naive models.     

Deindustrialization in 18th and 19th century India: Mughal decline, climate shocks and British industrial ascent

India was a major player in the world export market for textiles in the early 18th century, but by the middle of the 19th century it had lost all of its export market and much of its domestic market, primarily to Britain. The ensuing deindustrialization was greatest c1750-c1860. We ask how much of India’s deindustrialization was due to local supply-side forces—such as political fragmentation and a rising incidence of drought, and how much to world price shocks. An open, three-sector neo-Ricardian model organizes our thinking and a new relative price database implements the empirical analysis. We find local supply side forces were important from as early as 1700. We then assess the size of Indian deindustrialization in comparison with other parts of the periphery.     

Technology, endowments, and the factor content of bilateral trade

We derive testable restrictions relating the factor content of bilateral trade to bilateral differences in technology and endowments. This departs from the Heckscher-Ohlin-Vanek theorem which compares the factor content of net trade with factor abundance. We test the theoretical restrictions using a unique dataset that covers 41 developed and developing countries with disparate endowments and technology. We find evidence supporting the predictions. In addition: (1) The factor content predictions perform best for country pairs with larger endowment differences, and (2) for trade between capital-abundant countries, Ricardian international technology differences matter more than Heckscher-Ohlin factor endowment differences.     

基于机器学习方法的城市社区尺度商铺租金空间布局分析

研究目的：通过引入机器学习方法,利用地理时空大数据研究精细尺度的商铺租金分布,以弥补传统基于计量模型的租金分析中样本量不足、要素量化方式主观、模型形式僵化等问题。研究方法：研究利用网络爬虫技术获取相关时空大数据,随后采用密度制图、空间句法分析等量化相关指标,并通过LASSO模型筛选影响因子,最后采用机器学习方法对社区尺度商铺租金进行空间布局分析。研究结果：基于机器学习方法的广州市中心城区社区尺度商铺租金布局分析能较好拟合估计值和观测值,其分析结果显示广州市中心城区中荔湾区、越秀区、天河区和海珠区各自形成了成熟的高租金核心,商铺租金从高值区域向外逐渐下降。研究结论：该研究方法可以应用于房租、房价空间分布估计等领域,研究成果可作为基准地价更新、城市异值空间发现等的参考。     

Stumpage prices in Sweden 1909–2012: Testing for non-stationarity

The price of timber stumpage is one of the few natural-resource rents that can be directly observed as a market price. Rules for optimal timber harvesting under uncertainty have been found to depend on whether the timber rent price is non-stationary or stationary. In this study we extend previous research by Hultkrantz (1995) that tested for unit-root with an exogenous break point in Swedish stumpage prices from 1909 to 1990, employing data up to 2012, hence for 104 years, and unit-root tests with endogenously selected break points. We find support for a structural level break at the end of WW2 and that non-stationarity can be rejected. We show that this is a robust conclusion. There is thus no sign of a new break in the extended recent time period and no signal of a secular increase of timber resource scarcity.     

服务贸易、货物贸易和劳动生产率变动:理论和实证——基于李嘉图连续统模型的贸易差额分析

根据经验统计表明,服务贸易与货物贸易在差额变动和方向上存在替代性特征。文章以Dornbush等(1977)为基础考虑一个两国开放经济的李嘉图连续统模型,分析各国不同部门劳动生产率变化与服务成为贸易品两个因素对贸易形式和贸易差额变化的影响。研究表明在服务可贸易条件下,不同国家在服务部门和货物生产部门劳动生产率发生的相对差异变动,是导致各国货物或服务贸易差额关系变化的决定因素。而中国-OECD(1982-2004)的劳动生产率及贸易差额的数据检验,也较好地支持了此结论。