Using small-disturbance expansions, we derive analytic expressions for the bias of the OLS estimator an elasticity in a linear model, both at an individual sample point and at the sample mean. The magnitudes of these biases are illustrated with Australian expenditure data.

This paper simulates a dynamic traffic network by embedding an extra nonlinear delay function to represent traffic lights (or a similar regular delay) in each arc (or link), and it was shown that a late start driver may catch up with one who started earlier, subject only to the condition that...

A procedure for testing and evaluation of remote sensing instruments that makes use of two test sites in flat and complex terrain is presented. To illustrate the method, a system intercomparison experiment is presented involving one sodar and two lidars (pulsed and continuous-wave). The wind...

With constant deepening of development outlook of urban and rural integration, education circle starts to attach great importance to reform of personnel training program. Since scarcity of land resource and key role of land management in urban and rural integration, it is urgent to optimize the...

With the development of the society, the undergraduates training modes of land resources management major have diversified developed. The land resources management majors in universities with different background have various features in China. Chongqing Technology and Business University was...

Despite the high CO2 emission intensity of fossil and especially coal fired energy production, these energy carriers will play an important role during the coming decades. The case study identifies the main technological trajectories concerning more efficient fossil fuel combustion and explores...

<em>Landoltia punctata</em>, a widely distributed duckweed strain with the ability to accumulate starch, was used as a novel feedstock for bioethanol production by <em>Saccharomyces cerevisiae</em>. To improve ethanol production, pectinase pretreatment was used to release much more glucose from <em>L. punctata</em> mash...