Comparison of Four New General Classes of Search Designs

A factor screening experiment identifies a few important factors from a large list of factors that potentially influence the response. If a list consists of m factors each at three levels, a design is a subset of all possible 3 ^m runs. This paper considers the problem of finding designs with small numbers of runs, using the search linear model introduced in Srivastava (1975). The paper presents four new general classes of these 'search designs', each with 2 m −1 runs, which permit, at most, two important factors out of m factors to be searched for and identified. The paper compares the designs for 4 ≤ m ≤ 10, using arithmetic and geometric means of the determinants, traces and maximum characteristic roots of particular matrices. Two of the designs are found to be superior in all six criteria studied. The four designs are identical for m = 3 and this design is an optimal design in the class of all search designs under the six criteria. The four designs are also identical for m = 4 under some row and column permutations.     

The Land Question: Are There Answers?1

“The land question” as posed by Henry George a century ago was answered with a call for land reform, a change in the ownership and control of land. In present-day, market-oriented America the land question is answered with widely available land information for market and policy decisions. Information generated by the Agricultural Economics and Land Ownership Survey (AELOS) of the Census of Agriculture is a footing for analyzing land ownership, land transfers, property taxes, and other issues of land policy. In this paper the issues of ownership distribution and the distributive effects of taxation are defined with AELOS data. The AELOS shows that the distribution of land ownership is concentrated and shows that large landowners pay real property tax rates at less than half the rate of small landowners. Changes in land ownership, transfer, and taxation argue for repeating the AELOS in 1998. A case is presented for replacing the Census of Agriculture with a Census of Land in 2003.     

The Chinese Markets of MBA Education：Are The Customers Satisfied？

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African American Children's Adjustment: The Roles of Maternal and Teacher Depressive Symptoms

This study examined the unique and interactive roles of mother and teacher depressive symptoms in child adjustment in 277 African American single mother‐headed families, as well as whether the associations differed depending on the age and gender of the child. Findings revealed a significant association between maternal depressive symptoms and child depressive symptoms in girls, but not boys. Moreover, the combination of higher levels of both mother and teacher depressive symptoms was associated with the highest level of child depressive symptoms and, for younger children, externalizing symptoms. The importance of considering the multiple social contexts in which children interact is discussed.     

Defining the health care product to ensure quality and manage costs

The frenzy of health care reform activity now led by the Clinton Administration's American Health Security Act of 1993 might end in the worst of all possible outcomes: a new government entitlement program financed by business and a global budget. Unbridled entitlement could drive utilization of benefits to the maximum and, with a budget cap, guarantee rationing. So far, the administration has talked about expanding access and controlling costs--not about the health care product. Given the threat that change poses for vested interests, time will undoubtedly lapse before final implementation of a new system. Unless physicians involved in health management seize the opportunity during this window of opportunity to help shape the future of health care delivery, the likelihood of preserving the U.S. health care delivery system as we know it will be dim indeed.     

Children in immediate danger: Emergency removals in Finnish and Irish child protection

This paper presents a qualitative analysis of front‐line practices regarding emergency removals in Finnish and Irish child protection. It examines how the responses to children's immediate danger are framed by legislation and how front‐line practitioners assess the child's situation and make emergency placement decisions. The data consist of interviews with 16 Irish and 33 Finnish social workers. These child welfare protection systems respond differently to a task that appears to be similar. The Irish team‐based practice rests on the social workers' shared assessment of the child's needs, and the formal decision is made by the courts (or police officers at night‐time); and the Finnish practice involves only one single social worker who makes both the assessment and the removal decision. The Irish system is tightly time regulated, whereas the Finnish system provides a more flexible time frame. Both approaches put a lot of stress on social workers' practice, which also includes creative workarounds (e.g., “planned emergency removals” in Finland). Future research will need to explore these features from the point of view of a child's right to protection.     

What it means to be special: two sisters discuss their experiences

In this article, two adolescent sisters discuss and reflect upon the impact that the special education classification of one of them has had on their lives. The sisters, co-authors of this text, participated in designing the study and analyzing the data we produced; their voices are the core of this article. Issues about inclusion, the harms and benefits of special education classification, stigma, the multi-edged meanings of what it means to be “special,” and the often complicit roles of educators in perpetuating exclusionary policies all arise in the sisters’ discussions with each other, with their co-authors, and with pre-service teachers.     

A COMPUTER SIMULATION APPROACH TO THE TEACHING OF MAIL SURVEY STRATEGY ALTERNATIVES AND CHOICE

The author uses a computer simulation of mail questionnaire response rates to acquaint students with trade-offs in terms of survey cost, accuracy, and time. In the absence of a theoretical base in the literature, the approach familiarizes students with current issues and problems, and helps to develop a decision-making framework for this survey method. A step-by-step procedure emphasizing student involvement is described.     

The Role of Behavioral Responses in the Total Economic Consequences of Terrorist Attacks on U.S. Air Travel Targets

U.S. airports and airliners are prime terrorist targets. Not only do the facilities and equipment represent high‐value assets, but the fear and dread that is spread by such attacks can have tremendous effects on the U.S. economy. This article presents the methodology, data, and estimates of the macroeconomic impacts stemming from behavioral responses to a simulated terrorist attack on a U.S. airport and on a domestic airliner. The analysis is based on risk‐perception surveys of these two scenarios. The responses relate to reduced demand for airline travel, shifts to other modes, spending on nontravel items, and savings of potential travel expenditures by U.S. resident passengers considering flying domestic routes. We translate these responses to individual spending categories and feed these direct impact results into a computable general equilibrium (CGE) model of the U.S. economy to ascertain the indirect and total impacts on both the airline industry and the economy as a whole. Overall, the estimated impacts on GDP of both types of attacks exceed $10B. We find that the behavioral economic impacts are almost an order of magnitude higher than the ordinary business interruption impacts for the airliner attack and nearly two orders of magnitude higher for the airport attack. The results are robust to sensitivity tests on the travel behavior of U.S. residents in response to terrorism.