Search Results - "O'Brien, Robert M"

Visualizing Changes in the Age-Distributions of Homicides in the United States: 1964–2019 by O’Brien, Robert M.

“…Objective To demonstrate how visualization can aid in understanding crime rate data and provide new insights and hypotheses for some central criminological…”
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A consistent and general modified Venn diagram approach that provides insights into regression analysis by O'Brien, Robert M

“…Venn diagrams are used to provide an intuitive understanding of multiple regression analysis and these diagrams work well with two variables. The area of…”
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Dropping Highly Collinear Variables from a Model: Why it Typically is Not a Good Idea by O’Brien, Robert M.

“…Objective. To change the common practice of eliminating independent variables from models because they produce multicollinearity in an independent variable of…”
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Homicide Arrest Rate Trends in the United States: The Contributions of Periods and Cohorts (1965–2015) by O’Brien, Robert M.

“…Objectives To determine the contributions of period effects (controlling for ages and cohorts) and cohort effects (controlling for ages and periods) to the…”
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A caution regarding rules of thumb for variance inflation factors by O'BRIEN, Robert M

“…The Variance Inflation Factor (VIF) and tolerance are both widely used measures of the degree of multi-collinearity of the ith independent variable with the…”
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Constrained Estimators and Age-Period-Cohort Models by O’Brien, Robert M.

“…If a researcher wants to estimate the individual age, period, and cohort coefficients in an age-period-cohort (APC) model, the method of choice is constrained…”
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Visualizing rank deficient models: a row equation geometry of rank deficient matrices and constrained-regression by O'Brien, Robert M

“…Situations often arise in which the matrix of independent variables is not of full column rank. That is, there are one or more linear dependencies among the…”
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Comment of Liying Luo's Article, "Assessing Validity and Application Scope of the Intrinsic Estimator Approach to the Age-Period-Cohort Problem" by O'Brien, Robert M.

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MODEL MISSPECIFICATION WHEN ELIMINATING A FACTOR IN AGE-PERIOD-COHORT MULTIPLE CLASSIFICATION MODELS by O'Brien, Robert M.

“…The impossibility of uniquely estimating all of the age, period, and cohort coefficients in age-period-cohort multiple classification (APCMC) models without…”
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The age–period–cohort conundrum as two fundamental problems by O’Brien, Robert M.

“…In general the age–period–cohort (APC) conundrum refers to the problem of separating the effects of age-groups, periods, and cohorts. This formulation,…”
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Estimable functions in age-period-cohort models: a unified approach by O’Brien, Robert M.

“…Age-period-cohort (APC) models have an intriguing appeal because each of these factors may be independently associated with age-period-specific rates (or other…”
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Mixed models, linear dependency, and identification in age‐period‐cohort models by O'Brien, Robert M.

“…This paper examines the identification problem in age‐period‐cohort models that use either linear or categorically coded ages, periods, and cohorts or…”
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A simplified approach for establishing estimable functions in fixed effect age‐period‐cohort multiple classification models by O'Brien, Robert M.

“…Estimable functions play an important role in learning about certain aspects of the impact of ages, periods, and cohorts in age‐period‐cohort multiple…”
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Intrinsic Estimators as Constrained Estimators in Age-Period-Cohort Accounting Models by O’Brien, Robert M.

“…In this response to Wenjiang J. Fu, Kenneth C. Land, and Yang Yang's "On the Intrinsic Estimator and Constrained Estimators in Age-Period-Cohort Models" (same…”
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Can Cohort Replacement Explain Changes in the Relationship Between Age and Homicide Offending? by O'Brien, Robert M., Stockard, Jean

“…This paper focuses on shifts in the age distribution of homicide offending in the United States. This distribution remained remarkably stable with small but…”
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A Mixed Model Estimation of Age, Period, and Cohort Effects by O'Brien, Robert M., Hudson, Kenneth, Stockard, Jean

“…For more than 30 years, sociologists and demographers have struggled to come to terms with the age, period, cohort conundrum: Given the linear dependency…”
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Setting bounds on age, period, and cohort effects using observed data by O’Brien, Robert M.

“…This paper presents a method that uses observed data from an age-period table to set bounds on the age, period, and cohort effects in an age-period-cohort…”
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The Regional Journal in Sociology: Recent Trends and Observations by Schultz, Jessica, Elliott, James R., O'Brien, Robert M.

“…We investigate the historical trajectories of several sociological journals published by regional associations, focusing our attention on one of the first…”
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UCR violent crime rates, 1958–2000: recorded and offender-generated trends by O’Brien, Robert M

“…According to Uniform Crime Report data, the rates of some violent crimes, such as rapes and aggravated assaults, increased steadily from the early 1960s until…”
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Estimable intra-age, intra-period, and intra-cohort effects in age-period-cohort multiple classification models by O’Brien, Robert M.

“…Even if a researcher found a constraint that correctly identified an age-period-cohort multiple classification (APCMC) model, the results would not address the…”
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