Climate change, irrigation, and Israeli agriculture: Will warming be harmful?

This paper utilizes a Ricardian model to test the relationship between annual net revenues and climate across Israeli farms. The study finds that it is important to include the amount of irrigation water available to each farm in order to measure the response of farms to climate. With irrigation water omitted, the model predicts climate change is strictly beneficial. However, with water included, the model predicts that only modest climate changes are beneficial while drastic climate change in the long run will be harmful. Using the AOGCM Scenarios we show that farm net revenue is expected to increase. Although Israel has a relatively warm climate a mild increase in temperature is beneficial due to the ability to supply international markets with farm product early in the season.     

Optimal Farm-to-Market Transportation and Storage of Certain Agriculture Commodities: Bogota,Colombia ∗

Decision rules for the make-buy decision most often assume the form of single-item, incremental cost rules which, for application, require decisions to be made for each item in isolation from all others. While it has been recognized that such decision rules may be non-optimal in situations where equipment capacity limits exist, the literature has not considered other cases where non-optimality arises. The purpose of this paper is to use linear programming as a framework for evaluating the optimality of single-item, incremental cost rules. The major conclusion of this paper is that the presence of any type of binding constraint in the planning problem, regardless of its origin, renders a single-item decision rule potentially non-optimal. A set of optimal screening decision rules is developed to be used in conjunction with a linear programming model for make-buy decisions in cases where such binding constraints exist.     

Different but Similar: Social Comparison of Travel Motives Among Tourists

Although previous research suggests that people prefer to think of themselves as being authentic (or individualistic) travellers rather than stereotyped tourists, there have been few studies investigating the external validity of such claim. This paper addresses this research gap by investigating tendencies to dissociate the self from typical tourists in terms of travel motivation. Findings suggest that people perceive their own travel motives to be different from those who they perceive as typical tourists and that these tendencies generalize across people involved in different forms of tourism. This paper discusses the results from a social psychological perspective and provides implications for future research and destination management alike. © 2014 The Authors. International Journal of Tourism Research published by John Wiley & Sons, Ltd.     

Determinants of vacation travel among Israeli seniors: theory and evidence

This study investigates determinants of vacation travel among seniors. A consumer choice model is developed that incorporates effects of retirement and health on available leisure time, and effects of age and education on disposable income. The empirical implications of the model depend on leisure and income patterns, that in turn determine if time and budget constraints are binding. The model is illustrated using data collected from Israeli seniors. Results confirm theoretical predictions regarding the changing effectiveness of constraints as seniors grow older.     

Measuring the Recreational Value of Open Space

We develop aggregate measures of the recreational value of types of open space when data on individual site visitation are not available. Our procedure accounts for both the allocation (between the different types of open space) and participation (total number of trips) decisions. The procedure is applied to estimate the recreational value of three types of open spaces (beaches, urban parks and national parks) in Israel.     

The precision of statistics of international migrations--a study of flows between Italy and the Federal Republic of Germany

The authors compare the quality of data concerning migration between Italy and the Federal Republic of Germany. Data are from the population registers of both countries. The analysis finds that German sources show migration levels between the two countries to be twice as high as do the Italian sources. Reasons for these discrepancies are discussed.     

A TECHNICAL NOTE ON THE MATHEMATICS OF NON-ANNUAL COMPOUNDING

An expected return-systematic risk (r,β) criterion is used to develop a decision framework for investing in inventory. The direct incorporation of risk in the model in the context of the Capital Asset Pricing Model avoids the shortcoming of exogenous risk specification, which is inherent in both the return on investment and cost minimization criteria commonly employed in inventory management.