On a class of sets between a-open sets and gδ-open sets

In this paper, a new class of sets called Da-open sets are introduced and investigated with the help of gδ-open and δ-closed sets. Relationships between this new class and other related classes of sets are established and as an application Da-continuous functions have been dened to study its properties in terms of Da-open sets.Finally, some properties of Da-closed graph and (D.a)-closed graphs are investigated

On δ-preregular e*-open sets in topological spaces

In this paper, we introduce a new class of sets called, δ-preregular e*-open sets and investigate their properties and characterizations. By using δ-preregular e*-open sets, we obtain decompositions of complete continuity and decompositions of perfect continuity

The Adequacy of Life Insurance: Evidence from the Health and Retirement Survey

This study examines the adequacy of life insurance among married American couples approaching retirement. It improves upon previous work in two ways. First, it is based on recent, high quality data (the 1992 Health and Retirement Survey with matched Social Security earnings histories). Second, it employs new financial planning software to evaluate the life insurance needs of each household. This software embodies an elaborate life- cycle planning model that accounts for a broad array of demographic, economic, and financial characteristics. We find that a sizable minority of couples in the HRS sample are significantly underinsured. Almost one third of wives and more than 10 percent of husbands would have suffered living standard reductions of 20 percent or more had their spouses died in 1992. Underinsurance tends to be more common among low income households, couples with asymmetric earnings, younger households, couples with dependent children, and non-whites. In general, households with greater vulnerabilities do not appear to compensate adequately for these vulnerabilities through greater life insurance holdings. Among some groups, the frequency of underinsurance exceeds two-thirds, and the frequency of severe underinsurance (a reduction in living standard of 40 percent or greater) exceeds one-quarter.

How much should Americans be saving for retirement?

How much should Americans save prior to retirement? Given Social Security's shaky financial condition, this is a critical question for baby boomers. A financial planning program-ESPlanner-is applied to data from the Health and Retirement Survey (HRS) to consider the amount that households approaching retirement should save.Retirement ; Saving and investment ; Social security

The adequacy of life insurance: evidence from the health and retirement survey

This study examines life insurance adequacy among married American couples approaching retirement based on the 1992 Health and Retirement Survey with matched Social Security earnings histories. It evaluates each household's life insurance needs based on new financial planning software that embodies a life-cycle-planning model and covers a broad array of demographic, economic, and financial characteristics. A sizable minority of households are significantly underinsured. Almost one third of wives and over 10 percent of husbands would have suffered living-standard reductions greater than 20 percent had their spouses died in 1992.Insurance ; Life insurance companies

Effect of Nitrogen Fertilization and Liming on Rye-Ryegrass Yield and Soil pH Dynamics

Using ammonium based nitrogen fertilizers in crop production has been shown to acidify soils. Lime used to correct soil pH is an important cost to producers. Recommendations of the optimal level of nitrogen to apply typically ignore the cost of lime created by nitrogen fertilization. This study was aimed to estimate soil pH change in response to nitrogen and lime application, and determine the effect of considering the cost of lime on recommendations about the optimal level of nitrogen. Yield response and pH functions were estimated and used to determine optimal levels of inputs. The effect of the cost of lime on recommendations about the optimal level of nitrogen was found to be marginal. Nitrogen acidification was found to be more severe with nitrogen application amounts above recommended rates than with nitrogen that is used by the plant.Lime, Nitrogen, Soil pH, Rye-ryegrass, Crop Production/Industries, Production Economics,

The mismatch between life insurance holdings and financial vulnerabilities: evidence from the Health and Retirement Survey

Using data on older workers from the 1992 Health and Retirement Survey, along with an elaborate life-cycle planning model, the authors quantify the effect of each individual's death on the financial status of his or her survivors and the degree to which life insurance holdings moderate these consequences. The average change in living standard that would result from a spouse's death is small, both in absolute terms and relative to the decline that would occur without insurance. However, this average obscures a startling mismatch between insurance holdings and underlying vulnerabilities. For many of the most vulnerable, the amounts purchased are surprisingly small, and for many of the least vulnerable, the amounts are surprisingly large. As a result, uninsured vulnerabilities are quite widespread. The magnitude of these vulnerabilities, as well as the proclivity to address any given degree of vulnerability by purchasing life insurance, vary systematically with individual and household characteristics.Life insurance companies

The Mismatch Between Life Insurance Holdings and Financial Vulnerabilities: Evidence from the Survey of Consumer Finances

Using the 1995 Survey of Consumer Finances and an elaborate life-cycle model, we quantify the potential financial impact of each individual's death on his or her survivors, and we measure the degree to which life insurance moderates these consequences. Life insurance is essentially uncorrelated with financial vulnerability at every stage of the life cycle. As a result, the impact of insurance among at-risk households is modest, and substantial uninsured vulnerabilities are widespread, particularly among younger couples. Roughly two-thirds of poverty among surviving women and more than one-third of poverty among surviving men results from a failure to insure survivors against an undiminished living standard. We also identify a systematic gender bias: for any given level of financial vulnerability, couples provide significantly more protection for wives than for husbands.

The mismatch between life insurance holdings and financial vulnerabilities: evidence from the Survey of Consumer Finances

Using the 1995 Survey of Consumer Finances and an elaborate lifecycle model, we quantify the potential financial impact of each individual’s death on his or her survivors, and we measure the degree to which life insurance moderates these consequences. Life insurance is essentially uncorrelated with financial vulnerability at every stage of the life cycle. As a result, the impact of insurance among at-risk households is modest, and substantial uninsured vulnerabilities are widespread, particularly among younger couples. Roughly two-thirds of poverty among surviving women and more than one-third of poverty among surviving men results from a failure to insure survivors against an diminished living standard. We also identify a systematic gender bias: for any given level of financial vulnerability, couples provide significantly more protection for wives than for husbands.Insurance industry