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Retrospective Theses and Dissertations

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Full-Text Articles in Life Sciences

An Analysis Of The Iowan Angler's Fishing License Renewal Decision, Ryan R. French Jan 2006

An Analysis Of The Iowan Angler's Fishing License Renewal Decision, Ryan R. French

Retrospective Theses and Dissertations

The number of annual fishing licenses sold in Iowa has been in decline for two decades and has limited the amount of funds available to the Iowa Department of Natural Resources for fisheries management. The Iowa DNR is focused on reversing this trend through targeted marketing and efficient management of fishing resources. An analysis of Iowa anglers is performed with these goals in mind using past surveys and current customer data. The product of this analysis is a model which predicts whether a past customer will renew their license in the upcoming year. A logit model is developed using license ...


Numerical Optimization Of Recursive Systems Of Equations With An Application To Optimal Swine Genetic Selection , Richard Edmund Hawkins Jan 1999

Numerical Optimization Of Recursive Systems Of Equations With An Application To Optimal Swine Genetic Selection , Richard Edmund Hawkins

Retrospective Theses and Dissertations

A new dynamic programming method is developed for numerical optimization of recursive systems of equations, in which continuous choice variables determine the allowed choices in subsequent stages of the problem. The method works by dynamically creating bubbles, or subspaces, of the total search space, allowing the indexing of states visited for later use, and taking advantage of the fact that states adjacent to a visited state are likely to be visited. The method thereby allows search of spaces far larger than would traditionally be permitted by memory limitations. The search allows an infinite planning horizon, and tests at each stage ...


Television Advertising's Effect On The Demand For Different Types Of Fresh Beef: A Gibbs Sampling Approach, Jeremy Todd Benson Jan 1996

Television Advertising's Effect On The Demand For Different Types Of Fresh Beef: A Gibbs Sampling Approach, Jeremy Todd Benson

Retrospective Theses and Dissertations

No abstract provided.


U.S. Livestock Production And Factor Demand: A Multiproduct Dynamic Dual Approach, K. Eswaramoorthy Jan 1991

U.S. Livestock Production And Factor Demand: A Multiproduct Dynamic Dual Approach, K. Eswaramoorthy

Retrospective Theses and Dissertations

There is a need for modeling livestock production and factor use incorporating the interlinked dynamics of breeding herd adjustments in a theoretically consistent manner. Therefore, a multiple input-multiple output theoretical model is developed based on the adjustment cost hypothesis of production relationship involving sluggish adjustments of quasi-fixed inputs. Employing the results of intertemporal analogue of Hotelling's lemma, a system of equations of optimal output supply, variable input demand, and quasi-fixed inputs (livestock breeding herds) investment is derived. Various issues like aggregation, expectation formation, and nonjointness in implementing this theoretical model are appraised.;A normalized quadratic value function is used ...


Response Analysis Of Beef Feedlot Gain With Respect To Genetic And Environmental Inputs, Bryan Edwin Melton Jan 1976

Response Analysis Of Beef Feedlot Gain With Respect To Genetic And Environmental Inputs, Bryan Edwin Melton

Retrospective Theses and Dissertations

No abstract provided.


Economies Of Size In Swine Production: A Normative Approach, Terry E. Crall Jan 1972

Economies Of Size In Swine Production: A Normative Approach, Terry E. Crall

Retrospective Theses and Dissertations

No abstract provided.


The Effect Of The Hog-Corn Ratio On Swine Production In Iowa, Nathan Frank Burnham Jan 1972

The Effect Of The Hog-Corn Ratio On Swine Production In Iowa, Nathan Frank Burnham

Retrospective Theses and Dissertations

No abstract provided.


Optimum Swine Production And Marketing Strategies With Limited Farrowing And Finishing Space, Michael S. Hanrahan Jan 1972

Optimum Swine Production And Marketing Strategies With Limited Farrowing And Finishing Space, Michael S. Hanrahan

Retrospective Theses and Dissertations

No abstract provided.


An Analysis Of The Feeder Cattle Enterprise On Iowa Farms With The Use Of Linear Programming Techniques, James Roger Ahrenholz Jan 1969

An Analysis Of The Feeder Cattle Enterprise On Iowa Farms With The Use Of Linear Programming Techniques, James Roger Ahrenholz

Retrospective Theses and Dissertations

No abstract provided.


Quarterly Marketing Margin Equations For Pork, Beef And Lamb, Georg Karg Jan 1969

Quarterly Marketing Margin Equations For Pork, Beef And Lamb, Georg Karg

Retrospective Theses and Dissertations

No abstract provided.


Economics Of Livestock-Meat Industry In Japan, Chung-Chi Lu Jan 1968

Economics Of Livestock-Meat Industry In Japan, Chung-Chi Lu

Retrospective Theses and Dissertations

No abstract provided.


The Optimum Number, Size, And Location Of Turkey Processing Plants In A Three State Area, Murill Patrick Halvorson Jan 1968

The Optimum Number, Size, And Location Of Turkey Processing Plants In A Three State Area, Murill Patrick Halvorson

Retrospective Theses and Dissertations

No abstract provided.


Economic Incentives For Pheasant Production In Iowa, Harlan David Cook Jan 1967

Economic Incentives For Pheasant Production In Iowa, Harlan David Cook

Retrospective Theses and Dissertations

No abstract provided.


The Use And Costs Of Capital In Selected Beef Feedlots In Four Counties Of Northwest Iowa, Wayne William Gross Jan 1967

The Use And Costs Of Capital In Selected Beef Feedlots In Four Counties Of Northwest Iowa, Wayne William Gross

Retrospective Theses and Dissertations

No abstract provided.


Estimates Of Locational Shifts Of The Retail Feed Industry In Two Functional Economic Areas In Iowa, Stephen Keith Decook Jan 1967

Estimates Of Locational Shifts Of The Retail Feed Industry In Two Functional Economic Areas In Iowa, Stephen Keith Decook

Retrospective Theses and Dissertations

No abstract provided.


Solicitation Costs And Returns Of Selected Sioux City Livestock Commission Firms, David Harold Hammond Jan 1964

Solicitation Costs And Returns Of Selected Sioux City Livestock Commission Firms, David Harold Hammond

Retrospective Theses and Dissertations

No abstract provided.


Effect Of Diversification On Price And Income Stability In Livestock Production, Yaoji Lu Jan 1962

Effect Of Diversification On Price And Income Stability In Livestock Production, Yaoji Lu

Retrospective Theses and Dissertations

No abstract provided.


Direct Payments On 190-210 Pound Hogs: Estimated Effects And Costs To Government, James W. Gruebele Jan 1961

Direct Payments On 190-210 Pound Hogs: Estimated Effects And Costs To Government, James W. Gruebele

Retrospective Theses and Dissertations

No abstract provided.


Geographic And Interfarm Variation In The Hog Production Cycle, James B. Herendeen Jan 1960

Geographic And Interfarm Variation In The Hog Production Cycle, James B. Herendeen

Retrospective Theses and Dissertations

No abstract provided.


Effects Of Pork Production Technique On Optimum Farm Resource Use, George D. Irwin Jan 1959

Effects Of Pork Production Technique On Optimum Farm Resource Use, George D. Irwin

Retrospective Theses and Dissertations

No abstract provided.


Estimating Weekly And Daily Hog Marketings At Interior Iowa And Southern Minnesota Markets, Gene A. Futrell Jan 1957

Estimating Weekly And Daily Hog Marketings At Interior Iowa And Southern Minnesota Markets, Gene A. Futrell

Retrospective Theses and Dissertations

No abstract provided.


Costs Of Drying Buttermilk In Iowa Creameries, Lee Kolmer Jan 1952

Costs Of Drying Buttermilk In Iowa Creameries, Lee Kolmer

Retrospective Theses and Dissertations

No abstract provided.


Determinants Of The Extent And Type Of Cattle Feeding In Iowa, George G. Judge Jan 1949

Determinants Of The Extent And Type Of Cattle Feeding In Iowa, George G. Judge

Retrospective Theses and Dissertations

No abstract provided.