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1541. Policymaking and Caseload Dynamics: Homeless Shelters

Author:
William McAllister
Publication Date:
08-2004
Content Type:
Working Paper
Institution:
Institute for Social and Economic Research and Policy at Columbia University
Abstract:
Many social problems can be understood as “conceptual caseloads”, e.g., people in poverty, and actual programmatic caseloads are a major, specific concern for policymakers and public administrators. Thus, a crucial and fairly general concern is how caseloads—whether conceptual or programmatic—can be reduced. To address this concern, officials often fall back on politically or intuitively attractive ideas—preventing people from entering caseloads, for example. Failure to incorporate caseload dynamics, however, may mean prevention and other caseload reduction policies will deliver much less than promised, and may cause caseloads to grow. In this paper, we first show how caseload size depends only on the number of entrants to a caseload and the rate at which people leave a caseload. With this framework in mind, we then address two common, seemingly appropriate policy responses: preventing entrants and hastening leaving. However, we show how too little is now known about homeless prevention to pin high hopes on its utility and that some social welfare problems, like homelessness, may be too inhospitable for prevention's logic. We then explain how allocating resources to hasten leaving is not as straightforward as policymakers have assumed but rather must recognize caseload dynamics to avoid unintended growth. We conclude by explaining some limits and opportunities in using caseload dynamics for policymaking.
Topic:
Conflict Resolution, Economics, Government, and Poverty

1542. Measuring Economic Disadvantage During Childhood: A Group-Based Modeling Approach

Author:
Mary Clare Lennon, Robert L. Wagmiller, Philip M. Alberti, and J. Lawrence Aber
Publication Date:
06-2004
Content Type:
Working Paper
Institution:
Institute for Social and Economic Research and Policy at Columbia University
Abstract:
Recent research suggest that child well-being and subsequent status attainment are influenced not only by the overall magnitude of exposure to family economic disadvantage during childhood, but also by the age of exposure and significant changes in family economic circumstances. Unfortunately, traditional measures of children's economic deprivation – such as, permanent and transitory income, persistent or cumulative poverty, and the number and length of poverty spells – fail to differentiate between exposure to disadvantage at different stages in childhood and largely ignore how family economic circumstances are changing over time. In this paper we propose a new method for assessing economic disadvantage during childhood that captures both children's overall levels of exposure to economic disadvantage and their patterns of exposure. This new method, which takes advantage of recent advances in finite mixture modeling, uses a longitudinal latent class model to classify children into a limited number of groups with similar histories of exposure to family economic disadvantage. Using this new methodology, group membership can be related to both family background characteristics and achievement in childhood and early adulthood, making it possible both to assess how family characteristics affect patterns of exposure to disadvantage during childhood and directly test alternative theories about the effect of different patterns of exposure on achievement. In this paper the relationship between background factors – such as race, parental education, and family structure – and group membership is investigated, as is the association between group membership and achievement in early adulthood. The use of this technique is demonstrated using data from the Panel Study of Income Dynamics (PSID).
Topic:
Conflict Resolution, Conflict Prevention, Development, and Economics

1543. Reducing Bias in Treatment Effect Estimation in Observational Studies Suffering from Missing Data

Author:
Jennifer Hill
Publication Date:
01-2004
Content Type:
Working Paper
Institution:
Institute for Social and Economic Research and Policy at Columbia University
Abstract:
Matching based on estimated propensity scores (that is, the estimated conditional probability of being treated) has become an increasingly popular technique for causal inference over the past decade. By balancing observed covariates, propensity score methods reduce the risk of confounding causal processes. Estimation of propensity scores in the complete data case is generally straightforward since it uses standard methods (e.g. logistic regression or discriminant analysis) and relies on diagnostics that are relatively easy to calculate and interpret. Most studies, however, have missing data. This paper illustrates a principled approach to handling missing data when estimating propensity scores makes use of multiple imputation (MI). Placing the problem within the framework of the Rubin Causal Model makes the assumptions explicit by illustrating the interaction between the treatment assignment mechanism and the missing data mechanism. Several approaches for estimating propensity scores with incomplete data using MI are presented. Results demonstrating improved efficacy compared with existing methodology are discussed. These advantages include greater bias reduction and increased facility in model choice.
Topic:
Conflict Resolution, Development, Economics, and Education

1544. Can Long-Run Restrictions Identify Technology Shocks?

Author:
Luca Guerrieri, Christopher Gust, and Christopher J. Erceg
Publication Date:
10-2004
Content Type:
Working Paper
Institution:
Board of Governors of the Federal Reserve System
Abstract:
Gali's innovative approach of imposing long-run restrictions on a vector autoregression (VAR) to identify the effects of a technology shock has become widely utilized. In this paper, we investigate its reliability through Monte Carlo simulations using calibrated business cycle models. We find it encouraging that the impulse responses derived from applying the Gali methodology to the artificial data generally have the same sign and qualitative pattern as the true responses. However, we find considerable estimation uncertainty about the quantitative impact of a technology shock on macroeconomic variables, and little precision in estimating the contribution of technology shocks to business cycle fluctuations. More generally, our analysis emphasizes that the conditions under which the methodology performs well appear considerably more restrictive than implied by the key identifying assumption, and depend on model structure, the nature of the underlying shocks, and variable selection in the VAR. This cautions against interpreting responses derived from this approach as model-independent stylized.
Topic:
Conflict Resolution, Economics, International Trade and Finance, and Science and Technology

1545. Optimal Monetary and Fiscal Policy: A Linear-Quadratic Approach

Author:
Pierpaolo Benigno and Michael Woodford
Publication Date:
04-2004
Content Type:
Working Paper
Institution:
Board of Governors of the Federal Reserve System
Abstract:
We propose an integrated treatment of the problems of optimal monetary and fiscal policy, for an economy in which prices are sticky (so that the supplyside effects of tax changes are more complex than in standard fiscal analyses) and the only available sources of government revenue are distorting taxes (so that the fiscal consequences of monetary policy must be considered alongside the usual stabilization objectives). Our linear-quadratic approach allows us to nest both conventional analyses of optimal monetary stabilization policy and analyses of optimal tax-smoothing as special cases of our more general framework. We show how a linear-quadratic policy problem can be derived which yields a correct linear approximation to the optimal policy rules from the point of view of the maximization of expected discounted utility in a dynamic stochastic general-equilibrium model. Finally, in addition to characterizing the optimal dynamic responses to shocks under an optimal policy, we derive policy rules through which the monetary and fiscal authorities may implement the optimal equilibrium. These take the form of optimal targeting rules, specifying an appropriate target criterion for each authority.
Topic:
Conflict Resolution, Security, Economics, and International Trade and Finance

1546. The Iraqi Insurgency & Iraq Security Force Development

Author:
Carl Conetta
Publication Date:
07-2004
Content Type:
Working Paper
Institution:
Project on Defense Alternatives
Abstract:
Progress toward a stable peace in Iraq and the withdrawal of US troops begins with the painful recognition that America's recent troubles are largely self-inflicted. This is due principally to the adoption of mission objectives that far exceed what is necessary or pragmatic.
Topic:
Conflict Resolution, Government, Politics, and War
Political Geography:
United States, Iraq, America, and Middle East

1547. Radical Departure: Toward A Practical Peace in Iraq

Author:
Carl Conetta
Publication Date:
07-2004
Content Type:
Working Paper
Institution:
Project on Defense Alternatives
Abstract:
The key to enabling total US troop withdrawal from Iraq within 400 days is achieving a political accord with Sunni leaders at all levels and with Iraq's neighbors - especially Syria and Iran. The proximal aim would be to immediately lower the level of conflict inside Iraq by constricting both active and passive support for the insurgency, inside and outside the country. This would allow the United States to shift resources to the training mission and to adopt other de-escalatory measures - most importantly: a withdrawal time line. The strategic price of this diplomatic initiative would be a return to self-governance in Sunni areas, a guaranteed level of representation for these areas in the national assembly, an end to broad-brush measures of de-Baathification, an amnesty for most indigenous insurgents and for most former Baathists, and a de-escalation of the US confrontation with Syria and Iran regarding a range of issues. In conjunction with these diplomatic initiatives, the United States would announce a tentative time line for withdrawal of its troops from Iraq -- associated with training milestones. Also: US forces would end major offensive sweeps inside the country, adopt a defensive posture, and shift the emphasis of their activity to training Iraqi security forces. Finally: the Iraqi government would re-activate portions of the old army -- partly as a confidence-building measure, but also in order to (i) rob insurgent organizations of their recruiting base, (ii) augment the power of the new Iraqi security forces, and (iii) produce a better ethnic balance in the new forces (which are currently dominated by Kurds and Shiites). As new forces increase in capacity, US forces would be removed, further reducing a stimulus of insurgent action. Four hundred days - 57 weeks - is sufficient time to complete several Iraqi training cycles, including field exercises for many units at the battalion and brigade levels. Some division level training also can occur. Given sufficient resources (24,000 training personnel), 100,000 Iraqi security personnel can receive remedial training and another 80,000 new personnel can be trained and exercised during this period. Together with the full provision of all appropriate equipment, this development effort can yield Iraqi security forces that are several times more capable than those it controls in mid-2005. After thirteen months, the only foreign military assets remaining in Iraq would be a small monitoring and training mission with a security detail: less than 10,000 foreign civilian and military personnel in all. US troops should constitute no more than one-third of the military component -- that is, approximately 2,000 troops. This mission should be conducted under a three-year UN mandate and joint NATO-international command. In addition, the United States might maintain a 25,000-person rapid reaction task force in the region, but outside either Iraq or Saudi Arabia.
Topic:
Conflict Resolution, Government, Politics, and War
Political Geography:
United States, Iraq, and Middle East

1548. SIPRI Yearbook 2004: Armaments, Disarmament and International Security (Pocket-size Summary Edition)

Publication Date:
09-2004
Content Type:
Policy Brief
Institution:
Stockholm International Peace Research Institute (SIPRI)
Abstract:
The SIPRI Yearbook has been published since 1969. It brings together objective data and state-of-the-art analysis, offered by SIPRI's own staff and other experts, on all major aspects of arms control, peace and security. The 2004 edition takes as its connecting theme the impact of the Iraq crisis in many different dimensions of international security, but it also highlights important trends arising elsewhere, in both geographical and functional areas. The Yearbook is also published in Arabic, Chinese, Russian and Ukrainian editions. This condensed version is available on the Internet in English, French, German, Spanish and Swedish at http://editors.sipri.org/recpubs.html.
Topic:
Conflict Resolution, International Relations, and Peace Studies
Political Geography:
Middle East

1549. Are Events in Iraq after the Occupation an Ordinary Security Problem?

Author:
Nihat Ali Özcan
Publication Date:
03-2004
Content Type:
Journal Article
Institution:
Uluslararasi Iliskiler
Abstract:
The US carried out the Iraqi occupation quickly, easily and with few casualties. It put an end to the security bureaucracy in the name of building new Iraq after the war. After a short while it faced unexpected resistance in the regions where Sunnite Arabs live. Insurgents have proved by their choice of targets and use of methods that they have a long-term and systematical resistance strategy. The insurgents could organize quickly because of effective tribal order, power of old security bureaucracy which kept its integrity after the war and refusal of foreign occupation. Insurgents want to control the public in order to get rid of weakness. Therefore, the keypoint of contention is who will control the public. While insurgents commonly use "terror" and "violence", occupiers try on the one hand to make insurgents ineffective, on the other, to win the "heart and brain" of the public. Security questions may spread to whole country in Iraq where there are ethnic and religious struggles. Iraqi Shiites may be involved in the conflict. Kurdish claims on Kirkuk may bring an ethnic conflict to the agenda. If the US administration can't provide stability in Iraq as soon as possible, Iraq may drift into a civil war.
Topic:
Conflict Resolution, Conflict Prevention, Terrorism, and War
Political Geography:
United States, Iraq, Arabia, and Kirkuk

1550. Special Policy Forum Report: Combating Terror Financing In America

Author:
Dennis Lormel
Publication Date:
04-2004
Content Type:
Policy Brief
Institution:
The Washington Institute for Near East Policy
Abstract:
While individual terrorist attacks can be carried out at a relatively low cost, the need to recruit operatives and provide them with safe houses, training, and support requires significant funding. The United States has proven to be a good venue for fundraising by terrorist groups, particularly Hamas and Hizballah. Although such activities could indicate the presence of operational sleeper cells, these organizations are unlikely to risk losing their funding sources by carrying out an attack on U.S. soil, at least under the current circumstances. After all, the revenue sources of certain terrorist organizations have become increasingly restricted following attacks in other parts of the world (e.g., Turkey, Saudi Arabia), largely due to policy changes, more proactive law enforcement, and fear of prosecution on the part of front organizations.
Topic:
Conflict Resolution
Political Geography:
United States, America, Turkey, Middle East, and Arabia