1,299 research outputs found
On Developing and Validating Dynamic Systems: Simulation Engineering.
Dynamic systems, where the behaviour is the dominant characteristic, pose engineering challenges that are often neglected in model-based software engineering. However, supporting simulation development from design models is important in demonstrating that a simulator and simulation experiments are fit for their intended purpose. In engineering agent-based simulations, observable system behaviour is built up from the behaviour of low-level components; such simulations are used as research tools in (for instance) biological systems research. We have found that domain experts can validate diagrammatic models of behaviour and accompanying text, but we need model-based software development, and ideally automatable model transformation, to maintain fitness for purpose into code and experimentation. We present an exploration of behavioural model transformation, devising and applying manual transformation guidelines to an existing, published Java Mason simulator, created using the CoSMoS approach and UML-style state diagrams. We succeed in recreating part of the class structure of the code, but also expose many issues to be overcome, in terms of what needs to be modelled to enable transformation, and how and when design decisions are taken and documented. We also identify the need to generate the creation of low-level simulation, visualisation, and data capture mechanisms, and a means to design and encode simulation experimentation
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Economic Insecurity: Implications of Federal Budget Proposals for Low-Income Working Families
What happens when a family loses one or more vital work supports? This brief uses the Family Resource Simulator, developed by the National Center for Children in Poverty, to illustrate the impact of the loss of benefits on working families. The Simulator is a web-based tool that calculates a family’s resources and basic expenses in the context of federal and state policies as family earnings increase. Calculations are based on hypothetical families, created by selecting family characteristics and making choices about which public benefits the family receives when eligible
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Child Care in Colorado: Making Care More Affordable for Working Families
In Colorado, as in other states across the country, the high cost of child care puts reliable, high-quality care out of reach for many families. Child care subsidies can help, but current policies reach only a fraction of those in need of assistance. Moreover, families who do receive subsidies can find themselves penalized for working and earning more as just a small raise can trigger a substantial loss in benefits. Using results from NCCP's Family Resource Simulator, this report illustrates these policy challenges and discusses possible solutions that would better help Colorado's low- to moderate-income workers meet their child care needs
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Low-Income Families in Connecticut: Results from the Family Resource Simulator
About 85 percent of low-income children have parents who work, and most have at least one parent working full-time, year-round. Nonetheless, many of these parents are unable to afford basic necessities for their families, such as food, housing, and stable child care. Even a full-time job is not always enough to make ends meet, and many parents cannot get ahead simply by working more. As earnings increase—particularly as they rise above the official poverty level—families begin to lose eligibility for work supports. At the same time, work-related expenses, such as child care and transportation, increase. This means that parents may earn more without a family experiencing more financial security. In some cases, earning more actually leaves a family with fewer resources after the bills are paid.
The Family Resource Simulator, developed by the National Center for Children in Poverty, illustrates how this happens. This web-based tool calculates resources and expenses for a hypothetical family that the user "creates" by selecting city and state, family characteristics, income sources, and assets. The user also selects which public benefits the family receives when eligible and makes choices about what happens when the family loses benefits (e.g., does the family seek cheaper child care after losing a subsidy?).
The result is a series of charts that show the hypothetical family's total income from various sources as earnings rise, as well as the cost of basic family expenses. Using the Simulator, this report describes the experiences of two hypothetical families in the workforce
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Supporting Work in Illinois: The Challenges Ahead
Using results from NCCP's Family Resource Simulator, a policy simulation tool, this report analyzes the effectiveness of Illinois' "work support" policies—benefits such as earned income tax credits, health insurance coverage, child care assistance, and food stamps. We find that when families receive the benefits for which they are eligible, Illinois' policies are generally successful in helping families close the gap between low earnings and basic expenses. Rewarding progress in the workforce, however, remains a challenge. Small increases in family income can trigger sharp reductions in benefits, leaving families no better off—or even worse off—than before
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Low-Income Families in Massachusetts: Results from the Family Resource Simulator
About 85 percent of low-income children have parents who work, and most have at least one parent working full-time, year-round. Nonetheless, many of these parents are unable to afford basic necessities for their families, such as food, housing, and stable child care. Even a full-time job is not always enough to make ends meet, and many parents cannot get ahead simply by working more. As earnings increase—particularly as they rise above the official poverty level—families begin to lose eligibility for work supports. At the same time, work-related expenses, such as child care and transportation, increase. This means that parents may earn more without a family experiencing more financial security. In some cases, earning more actually leaves a family with fewer resources after the bills are paid.
The Family Resource Simulator, developed by the National Center for Children in Poverty, illustrates how this happens. This web-based tool calculates resources and expenses for a hypothetical family that the user "creates" by selecting city and state, family characteristics, income sources, and assets. The user also selects which public benefits the family receives when eligible and makes choices about what happens when the family loses benefits (e.g., does the family seek cheaper child care after losing a subsidy?).
The result is a series of charts that show the hypothetical family's total income from various sources as earnings rise, as well as the cost of basic family expenses. Using the Simulator, this report describes the experiences of two hypothetical families in the workforce
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Low-Income Families in Pennsylvania: Results from the Family Resource Simulator
About 85 percent of low-income children have parents who work, and most have at least one parent working full-time, year-round. Nonetheless, many of these parents are unable to afford basic necessities for their families, such as food, housing, and stable child care. Even a full-time job is not always enough to make ends meet, and many parents cannot get ahead simply by working more. As earnings increase—particularly as they rise above the official poverty level—families begin to lose eligibility for work supports. At the same time, work-related expenses, such as child care and transportation, increase. This means that parents may earn more without a family experiencing more financial security. In some cases, earning more actually leaves a family with fewer resources after the bills are paid.
The Family Resource Simulator, developed by the National Center for Children in Poverty, illustrates how this happens. This web-based tool calculates resources and expenses for a hypothetical family that the user "creates" by selecting city and state, family characteristics, income sources, and assets. The user also selects which public benefits the family receives when eligible and makes choices about what happens when the family loses benefits (e.g., does the family seek cheaper child care after losing a subsidy?).
The result is a series of charts that show the hypothetical family's total income from various sources as earnings rise, as well as the cost of basic family expenses. Using the Simulator, this report describes the experiences of two hypothetical families in the workforce
Recommended from our members
Low-Income Families in Delaware: Results from the Family Resource Simulator
About 85 percent of low-income children have parents who work, and most have at least one parent working full-time, year-round. Nonetheless, many of these parents are unable to afford basic necessities for their families, such as food, housing, and stable child care. Even a full-time job is not always enough to make ends meet, and many parents cannot get ahead simply by working more. As earnings increase—particularly as they rise above the official poverty level—families begin to lose eligibility for work supports. At the same time, work-related expenses, such as child care and transportation, increase. This means that parents may earn more without a family experiencing more financial security. In some cases, earning more actually leaves a family with fewer resources after the bills are paid. The Family Resource Simulator, developed by the National Center for Children in Poverty, illustrates how this happens. This web-based tool calculates resources and expenses for a hypothetical family that the user "creates" by selecting city and state, family characteristics, income sources, and assets. The user also selects which public benefits the family receives when eligible and makes choices about what happens when the family loses benefits (e.g., does the family seek cheaper child care after losing a subsidy?). The result is a series of charts that show the hypothetical family's total income from various sources as earnings rise, as well as the cost of basic family expenses. Using the Simulator, this report describes the experiences of two hypothetical families in the workforce
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