Statistical Estimation of Dynamic Tobit Models

2006 ◽  
pp. 830-833
Author(s):  
Yow-Jen Jou ◽  
Wan-Ru Chang ◽  
Chien-Lun Lan
Keyword(s):  
Statistical Estimation ◽  
Tobit Models

DIFFRACTION ANALYSIS OF DEFORMED METALS: Theory, Methods, Programs

2019 ◽  
Author(s):  
Faina Satdarova
Keyword(s):  
Experimental Design ◽  
Dislocation Density ◽  
Mathematical Models ◽  
Diffraction Analysis ◽  
Experimental Research ◽  
Russian Federation ◽  
Statistical Estimation ◽  
X Rays ◽  
National University ◽  
The Russian Federation

General analysis of the distribution of crystals orientation and dislocation density in the polycrystalline system is presented. Recovered information in diffraction of X-rays adopting is new to structure states of polycrystal. Shear phase transformations in metals — at the macroscopic and microscopic levels — become a clear process. Visualizing the advances is produced by program included in package delivered. Mathematical models developing, experimental design, optimal statistical estimation, simulation the system under study and evolution process on loading serves as instrumentation. To reduce advanced methods to research and studies problem-oriented software will promote when installed. Automation programs passed a testing in the National University of Science and Technology “MISIS” (The Russian Federation, Moscow). You score an advantage in theoretical and experimental research in the field of physics of metals.

LATTE - Linking Acoustic Tests and Tagging Using Statistical Estimation

2013 ◽  
Author(s):  
Len Thomas ◽  
John Harwood ◽  
Ian L. Boyd ◽  
David Moretti
Keyword(s):  
Statistical Estimation

LATTE - Linking Acoustic Tests and Tagging Using Statistical Estimation

2011 ◽  
Author(s):  
Len Thomas ◽  
Ian L. Boyd ◽  
John Harwood ◽  
David Moretti
Keyword(s):  
Statistical Estimation

NEW RESULTS IN REDUCED ESTIMATION WITH SYSTEMATIC ERRORS IN MEASUREMENTS AND THEIR APPLICATION FOR THE FORMATION OF A GROUP TIME SCALE

2018 ◽  
pp. 30-37
Author(s):  
A. P. Aleshkin ◽  
A. A. Makarov ◽  
Yu. F. Matasov
Keyword(s):  
Time Scale ◽  
Statistical Estimation ◽  
Systematic Errors ◽  
Random Component ◽  
Customer Support ◽  
Group Time ◽  
Reduction Coefficient ◽  
Systematic Component ◽  
Compression Parameter ◽  
Positive Effect

The article deals with the behavior of reduced scalar estimates in the presence of systematic errors in the observational data. The proposed procedure with a different method of forming the reduction coefficient. A quasi-optimal variant of the compression parameter formation is considered. Simulation results for different conditions of application of the proposed algorithms are presented. Currently, one of the ways to improve the accuracy of the formation of the time scale in solving the problems of frequency-time customer support is the averaging of the readings of several generators. At the same time, this approach, as shown in the theory of statistical estimation, is effective for parrying the random component of the error of the estimated process. However, for frequency generators random error can be effectively compensated for a long range of observations, but the systematic component - frequency drift - is a serious problem, which can be eliminated by averaging only under certain conditions. Therefore, the article proposes a version of the reduced estimate, effective, as shown, to parry the departure of the time scale by introducing a shift in the implementation of compression, defined by the reduction procedure. The conditions in which the degree of the achieved positive effect has a practical sense are considered.

scholarly journals Comparison study in statistical estimation of gene effects based on a real data set

2021 ◽  
Vol 1978 (1) ◽  
pp. 012047
Author(s):  
Xiaona Sheng ◽  
Yuqiu Ma ◽  
Jiabin Zhou ◽  
Jingjing Zhou
Keyword(s):  
Statistical Estimation ◽  
Real Data ◽  
Comparison Study ◽  
Data Set ◽  
Gene Effects

scholarly journals Statistical estimation of gene expression using multiple laser scans of microarrays

2005 ◽  
Vol 22 (2) ◽  
pp. 215-219 ◽  
Author(s):  
M. R. Khondoker ◽  
C. A. Glasbey ◽  
B. J. Worton
Keyword(s):  
Gene Expression ◽  
Statistical Estimation

The Effect of Rural Poverty on Access to Land in Ethiopia

2021 ◽  
pp. 097300522097106
Author(s):  
Kassie Dessie Nigussie ◽  
Assefa Admassie ◽  
M. K. Jayamohan
Keyword(s):  
Panel Data ◽  
Rural Poverty ◽  
Land Ownership ◽  
Ordered Probit ◽  
Rural Poor ◽  
Rental Market ◽  
Tobit Models ◽  
Significance Levels ◽  
Poverty Status

Land ownership and its persistent gap between rich and poor is one of the pressing development challenges in Africa. Access to land has fundamental implications for a poor and agrarian African economy like Ethiopia, where most people depend on agriculture for their livelihood. Empirical literatures suggest that access to land is a cause and effect of poverty—at the same time, the role of poverty status of the household in gaining or limiting access to land has received only a passing attention from researchers. This study investigates the effect of ‘being poor’ on access to land using ordered probit and censored tobit models. Three wave panel data of Ethiopian Rural Socioeconomic Survey (ERSS) collected between 2011–12 and 2015–16 are used for the analysis. The study result confirms that poverty does have significant effect on household’s participation and intensity of participation on both sides of the rental market. It is found that being poor, as compared to non-poor counterpart, leads to an increase in the likelihood of rent-in land by 0.068 hectare and reduce the likelihood of rent-out land by 0.046 hectare at 1% and 5% significance levels, respectively. The tenants are not characterised as economically disadvantaged reflecting the existence of reverse tenancy among rural poor in Ethiopia.

scholarly journals Demography of galactic technosignatures

2020 ◽  
Vol 500 (2) ◽  
pp. 2278-2288
Author(s):  
Claudio Grimaldi
Keyword(s):  
Statistical Estimation ◽  
Milky Way ◽  
Comprehensive Overview ◽  
Direct Observations ◽  
The Galaxy ◽  
Electromagnetic Emissions ◽  
Average Longevity

ABSTRACT Probabilistic arguments about the existence of technological life beyond Earth traditionally refer to the Drake equation to draw possible estimates of the number of technologically advanced civilizations releasing, either intentionally or not, electromagnetic emissions in the Milky Way. Here, we introduce other indicators than Drake’s number ND to develop a demography of artificial emissions populating the Galaxy. We focus on three main categories of statistically independent signals (isotropic, narrow beams, and rotating beacons) to calculate the average number NG of emission processes present in the Galaxy and the average number of them crossing Earth, $\bar{k}$, which is a quantity amenable to statistical estimation from direct observations. We show that $\bar{k}$ coincides with ND only for isotropic emissions, while $\bar{k}$ can be orders of magnitude smaller than ND in the case of highly directional signals. We further show that while ND gives the number of emissions being released at the present time, NG considers also the signals from no longer active emitters but whose emissions still occupy the Galaxy. We find that as long as the average longevity of the emissions is shorter than about 105 yr, NG is fully determined by the rate of emissions alone, in contrast to ND and $\bar{k}$ which depend also on the emission longevity. Finally, using analytic formulas of NG, ND, and $\bar{k}$ determined for each type of emission processes here considered, we provide a comprehensive overview of the values these quantities can possibly achieve as functions of the emission birthrates, longevities, and directionality.

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