Polycyclic aromatic hydrocarbons (PAHs) and n-alkanes are important specific organic constituents in fine particulate matter (PM2.5). Seventy-five PM2.5 samples were collected Spring Changzhou, to investigate the concentrations sources of (C9–C40) PAHs. The average total PAHs (∑PAHs) (∑n-alkanes) 4.37 ± 4.95 ng/m3 252.37 184.02 ng/m3, ranging from 0.43 22.22 57.37 972.17 respectively. ∑n-alkane...

This paper investigates the impact of individual heterogeneity and regional influences on unemployment duration utilising cross-section microeconomic data drawn from a representative random survey of individual job seekers for the English County of Kent. These individual-level data are unique in that they provide information concerning the personal characteristics of job seekers, alongside dire...

The organisms studied were those of the family Micrococcaceae which cannot participate in genetic exchange with Micrococcus luteus and those whose biochemical and physiological characteristics appear to bridge the genera Staphylococcus and Micrococcus. The hydrocarbon compositions of M. luteus ATCC 4698 and Micrococcus sp. ATCC 398 were shown to be similar to those previously reported for many ...

How Does Education Affect the Earnings Distribution in Urban China? China’s phenomenal growth is accompanied by both relatively low level of standards of living and high inequality. It is widely believe that investing in education could be an effective strategy to promote higher standards of living as well as to reduce inequality. However, little is known about whether this belief is empiricall...

Maximum Likelihood Estimation and Lagrange Multiplier Tests for Panel Seemingly Unrelated Regressions with Spatial Lag and Spatial Errors: An Application to Hedonic Housing Prices in Paris This paper proposes maximum likelihood estimators for panel seemingly unrelated regressions with both spatial lag and spatial error components. We study the general case where spatial effects are incorporated...

This paper considers estimation of slope coe¢ cients in large panel data models where even after conditioning on common observed e¤ects the cross section units might remain dependently distributed. This could arise when the cross section units are subject to unobserved common e¤ects and/or if there are spill over e¤ects due to spatial or other forms of local dependencies. Initially it focuses o...

Robust Confidence Intervals for Average Treatment Effects under Limited Overlap Estimators of average treatment effects under unconfounded treatment assignment are known to become rather imprecise if there is limited overlap in the covariate distributions between the treatment groups. But such limited overlap can also have a detrimental effect on inference, and lead for example to highly distor...