Editors‎'‎ introduction‎:‎ inference and shoe leather‎;‎ Part I‎.‎ Statistical Modeling‎:‎ Foundations and Limitations‎:‎ 1‎.‎ Some issues in the foundations of statistics‎:‎ probability and model validation‎;‎ 2‎.‎ Statistical assumptions as empirical commitments‎;‎ 3‎.‎ Statistical models and shoe leather‎;‎ Part II‎.‎ Studies in Political Science‎,‎ Public Policy‎,‎ and Epidemiology‎:‎ 4‎.‎ Methods for Census 2000 and statistical adjustments‎;‎ 5‎.‎ On ‎'‎solutions‎'‎ to the ecological inference problem‎;‎ 6‎.‎ Rejoinder to King‎;‎ 7‎.‎ Black ravens‎,‎ white shoes‎,‎ and case selection‎:‎ inference with categorical variables‎;‎ 8‎.‎ What is the chance of an earthquake‎?‎‎;‎ 9‎.‎ Salt and blood pressure‎:‎ conventional wisdom reconsidered‎;‎ 10‎.‎ The Swine Flu vaccine and Guillain‎-Barre Syndrome‎:‎ relative risk and specific causation‎;‎ 11‎.‎ Survival analysis‎:‎ an epidemiological hazard‎?‎‎;‎ Part III‎.‎ New Developments‎:‎ Progress or Regress‎?‎‎:‎ 12‎.‎ On regression adjustments in experiments with several treatments‎;‎ 13‎.‎ Randomization does not justify logistic regression‎;‎ 14‎.‎ The grand leap‎;‎ 15‎.‎ On specifying graphical models for causation‎,‎ and the identification problem‎;‎ 16‎.‎ Weighting regressions by propensity scores‎;‎ 17‎.‎ On the so‎-called ‎'‎Huber sandwich estimator‎'‎ and ‎'‎robust standard errors‎'‎‎;‎ 18‎.‎ Endogeneity in probit response models‎;‎ 19‎.‎ Diagnostics cannot have much power against general alternatives‎;‎ Part IV‎.‎ Shoe Leather‎,‎ Revisited‎:‎ 20‎.‎ On types of scientific inquiry‎:‎ the role of quantitative reasoning‎.‎