DO FOOD ASSISTANCE PROGRAMS IMPROVE HOUSEHOLD FOOD SECURITY?: RECENT EVIDENCE FROM THE UNITED STATES

Food assistance programs play an important role in meeting the basic needs of low income households. This paper examines the interaction among food stamps, labor force participation and food insecurity status of low-income households under different program design and economic conditions. A simultaneous equation model with three probit equations links the program, work force participation and outcome. Results based on the Survey of Program Dynamics data suggest that Food Stamp Program participation is more responsive to changes in the program benefits than to changes in unemployment rate or nonlabor income; food insecurity status is more responsive to changes in the food program benefit or unemployment rate, than to nonlabor income.food assistance, food security, hunger, and welfare programs, Food Security and Poverty,

Social Assistance Programs and Outcomes: Food Assistance in the Context of Welfare Reform

Food assistance programs play an important role in meeting the basic needs of low-income households. We consider the complex interactions among food stamps, labor force participation, and food insecurity status of low-income households under different program designs and economic conditions. The analysis uses data from the Survey of Program Dynamics to jointly estimate the role of participation in the Food Stamp Program (FSP), labor market participation and well-being, measured as food security, through the use of a simultaneous equation model. The results of our research suggest that food insecurity has a positive effect on FSP participation while labor force participation reduces FSP participation. Furthermore, FSP participation is more responsive to changes in the program benefits than to changes in nonlabor income. The linkages among food program participation, labor force participation, and well-being, measured in terms of food insecurity, are complex. The structural approach provides evidence that, among low-income households, program parameters affect FSP participation but no evidence that the food assistance reduces food insecurity.

DEMAND FOR ENHANCED FOODS AND THE VALUE OF NUTRITIONAL ENHANCEMENTS OF FOOD: THE CASE OF MARGARINES

This paper evaluates consumer preferences and choice of nutritionally enhanced food products based on economic, geographic, ethnic and other socioeconomic characteristics. Household scanner data allow estimation of hedonic price function and a probit model on the choice of margarine that promotes good health. The empirical estimation established a positive value for nutritional enhancement.scanner data, hedonic approach, demand for healthy food, Food Consumption/Nutrition/Food Safety,

Subsonic longitudinal aerodynamic characteristics of a vectored-engine-over-wing configuration having spanwise leading-edge vortex enhancement

A configuration which integrates a close coupled canard wing combination, spanwise blowing for enhancement of the wing leading edge vortex, an engine-over-wing concept, and a wing trailing edge coanda-effect flap is studied. The data on the configuration are presented in tabular from without discussion. The investigation was conducted in the Langley 7- by 10-foot high speed tunnel at a Mach number of 0.166 through an angle-of-attack range from -2 to 22 deg. Rectangular main engine nozzles of aspect ratio 4, 6, and 8 were tested over a momentum coefficient range from 1.0 to 1.8

The Impact of Professional Development on Specially Designed Instruction for Students With a Specific Learning Disability

This research study, rooted in the theoretical framework of phenomenology, examined the impact of professional development related to specially designed instruction for students with a learning disability in reading. Teachers of students who had mastered at least 50% of their IEP goals in reading or had exited from special education services were the participants in this study. In addition to the teachers, administrators and district staff who worked with these teachers and students were included. Through a mixed methods research design, 47 participants were surveyed using Qualtrics, and 14 participants were interviewed. Findings demonstrated that professional development related to specially designed instruction proved beneficial to teachers, administrators, and district staff in helping students receive direct and intensive support in overcoming deficits and mastering goals. However, roadblocks such as lack of coaching, few incentives for professional development, scheduling conflicts, and vacancies negatively impacted the effectiveness of the professional development implementation. This research will provide the district with recommendations on how to increase the effectiveness of professional development for teachers related to specially designed instruction for students with a learning disability in reading to facilitate student progress

Iridium, shocked minerals, and trace elements across the Cretaceous/Tertiary boundary at Maud Rise, Wedell Sea, and Walvis Ridge, South Atlantic Ocean

Sediments spanning a 5 meter section across the Cretaceous-Tertiary boundary at ODP holes 689B and 690D, Maud Rise, Wedell Sea and hole 527, Walvis Ridge, are being analyzed for shock deformation, PGE's and other trace elements (including REE's). Mineral separates from each sample were studied with optical microscopy to determine the distribution and microstructural state of quartz and feldspar present in the sediments. Samples from Maud Rise were taken of the K/T transition and at about 50 cm intervals above and below it. These samples consist of carbonate-rich sediments, with the K/T transition marked by a change from white Maastrichtian oozes to a greenish ooze with higher concentrations of altered volcanic clay and vitric ash. The Walvis Ridge site is characterized by more clay-rich sediments with average carbonate content about 60 to 70 percent. Initial results from RNAA studies indicate that iridium is present in all the Maud Rise samples in concentrations equal to or greater than 0.01 ppb (whole-rock basis). Preliminary results from optical microscopy indicate the occurrence of shock mosaicism in quartz and feldspar in all of the samples studied. The pervasiveness of shock mosaicism and presence of planar features to 2 meters from the K/T boundary indicates that a single impact or volcanic explosion 66 ma may be ruled out as responsible for the K/T event. A similar conclusion may be drawn independently from the distribution of iridium and other trace elements. Regardless of the source of the shock waves and sediment contamination, multiple events are required over a ca.0.5 my timespan; currently we favor endogenous sources

Subsonic longitudinal aerodynamic characteristics and engine pressure distributions for an aircraft with an integrated scramjet designed for Mach 6 cruise

A 1/10-scale model of a proposed hypersonic aircraft with an integrated scramjet was tested. The investigation took place over a Mach number range from 0.2 to 0.7 and an angle of attack range from 2 deg to approximately 17 deg at a sideslip angle of 0 deg. The primary configuration variables studied were engine location, internal engine geometry, and external engine geometry. The results are presented without analysis

Experimental study of wing leading-edge devices for improved maneuver performance of a supercritical maneuvering fighter configuration

Wind tunnel tests were conducted to examine the use of wing leading-edge devices for improved subsonic and transonic maneuver performance. These devices were tested on a fighter configuration which utilized supercritical-wing technology. The configuration had a leading-edge sweep of 45 deg and an aspect ratio of 3.28. The tests were conducted at Mach numbers of 0.60 and 0.85 with angles of attack from -0.5 deg to 22 deg. At both Mach numbers, sharp leading-edge flaps produced vortices which greatly altered the flow pattern on the wing and resulted in substantial reductions in drag at high lift. Underwing or pylon-type vortex generators also reduced drag at high lift. The vortex generators worked better at a Mach number of 0.60. The vortex generators gave the best overall results with zero toe-in angle and when mounted on either the outboard part of the wing or at both an outboard location and halfway out the semispan. Both the flaps and the vortex generators had a minor effect on the pitching moment. Fluorescent minitufts were found to be useful for flow visualization at transonic maneuver conditions