Kirjahaku

Where an assumption of unidirectionality in causal effects is unrealistic, 'recursive' models cannot be used, and more complex 'nonrecursive' models are necessary. Unfortunately, many nonrecursive models (unlike recursive models) are 'unidentified', which makes meaningful parameter estimation impossible. Even when they are identified, it would be inappropriate to use OLS regression techniques (appropriate for recursive models) for the purpose of estimation. The concept of identification, and the factors that lead to it are explained; and various tests for determination are provided. Illustrations from a variety of social science disciplines are used throughout the book.

Through the use of careful explanations and examples, Berry shows the reader how to consider whether the assumptions of multiple regression are actually satisfied in a particular research project. Beginning with a brief review of the regression assumptions as they are typically presented in textbooks, Berry moves on to explore in detail the "substantive" meaning of each assumption (such as lack of measurement error, absence of specification error, linearity, homoscedasticity, and lack of autocorrelation). Aimed at improving social science applications of regression, this volume is a must for every student's and researcher's library.

Texas in 1858 was a land in dispute. The white settlers were encroaching further westward yearly causing the Comanche homelands to shrink to the edge of the Staked Plains of West Texas. The future of the Red Nation rested in the ability of the tribes to stop the encroachment of the land- hungry white men. The battle between the Texicans and Comanche had been ongoing for thirty years and had resulted in the steady loss of the red man's homelands in eastern central Texas. The Comanches were led by Horse Walking, an embittered Quahidi war chief, who understood that the westward march of the settlers must be stopped or slowed if only for a few years. His plan called for the death of his arch enemy of many years Josh Mckeeg. Mckeeg was a Captain of a Texas Ranging Company who had established a ranch and home for he and his family on the disputed eastern border of the Comanche homeland. The ranger had built not only a home but a strong fort-like structure that would furnish protection and security for the neighboring settlers on the sparsely populated frontier. Mackeeg had hunted Horse Walking for many years and hated the Indian not because the Comanche fought the Texicans, but because the red man enjoyed the killing and torture. The recent events of this long struggle had brought them both to the point of decision. The time for the culmination of this conflict was at hand. This is the story of their final confrontation. This is not just a story of a brave man but also the story of his wife and children. Without his family he would not have survived.

Post Civil War Texas was in the hands of carpet-baggers and scalawags. The taxes imposed on rancher Josh McKeeg were exorbitant, and if he cannot not pay, he will lose his ranch. He must come up with a way to pay the taxes and help his neighbors as well. The solution lies in a cattle drive that reaches from the Brazos River in Texas to the mountains of Denver, Colorado. This is the second book in the saga of the McKeeg family.