Using the life table method, we analyzed in this paper the survival of enterprises that were established from 1980 to 2007 in the Hunan province. Based on the quantile indicators, the average remaining firm lifespan in the specified period of time and the average survival time during a specific...

This paper presents a model for the optimal allocation of water resources in saltwater intrusion areas. The model is comprised of four modules: a joint operation of river and reservoirs module (JORRM), a saltwater intrusion analysis module (SIAM), an economic analysis and in-stream ecology...

Recently, Foreign Invested Enterprises (FIEs) in China have increased their investment in not only production activity but also R&D activity. This paper examines the impact of spillovers from such activities by FIEs on two types of innovations by Chinese domestic firms: Total Factor Productivity...

Bus system performance varies from city to city, and experience clearly indicates that simply increasing the size of bus fleet cannot always improve bus system performance. It is therefore necessary to identify the major variables of bus system performance in different cities and implement a...

In parametric, nonlinear structural models, a classical sufficient condition for local identification, like Fisher (1966) and Rothenberg (1971), is that the vector of moment conditions is differentiable at the true parameter with full rank derivative matrix. We derive an analogous result for the...

The goal of this paper is to develop techniques to simplify semiparametric inference. We do this by deriving a number of numerical equivalence results. These illustrate that in many cases, one can obtain estimates of semiparametric variances using standard formulas derived in the well-known...

This paper considers inference on functionals of semi/nonparametric conditional moment restrictions with possibly nonsmooth generalized residuals, which include all of the (nonlinear) nonparametric instrumental variables (IV) as special cases. These models are often ill-posed and hence it is...

We discuss a number of issues in the smoothed nonparametric estimation of kernel conditional probability density functions for stationary processes. The kernel conditional density estimate is a ratio of joint and marginal density estimates. We point out the different implications of leading...

Financial practices often need to estimate an integrated volatility matrix of a large number of assets using noisy high-frequency data. Many existing estimators of a volatility matrix of small dimensions become inconsistent when the size of the matrix is close to or larger than the sample size....

Liquefaction bio-oil from sewage sludge using different organic solvent (methanol, ethanol or acetone) at temperature of 260–380 °C was characterized in terms of its elemental and chemical composition, and was further upgraded by microemulsion technology. The bio-oil obtained had high carbon...