Download or read book Essays in Weak Identification written by Isaiah Smith Andrews and published by . This book was released on 2014 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Economic researchers and policymakers need reliable tools both to estimate economic relationships and to measure the uncertainty surrounding their estimates. Unfortunately, economic data sometimes contains limited information useful for estimating relationships of interest. In such cases, the statistical techniques commonly used in applied economics can break down and fail to accurately reflect the level of uncertainty present in the data. If they rely on such tools, researchers and policymakers may come away with serious misconceptions about the precision and reliability of their estimates. Econometricians refer to models where the lack of information in the data causes common statistical techniques to break down as weakly identified. In this thesis, I examine several questions relating to weak identification. In the first chapter, I introduce the class of conditional linear combination tests. These tests control size under weak identification and have a number of optimality properties in a conditional problem. I suggest using minimax regret conditional linear combination tests and propose a computationally tractable class of tests that plug in an estimator for a nuisance parameter. In the second chapter, I consider the problem of detecting weak identification. When weak identification is a concern researchers frequently calculate confidence sets in two steps, first assessing the strength of identification and then deciding whether to use an identification-robust confidence set. Two-step procedures of this sort may generate highly misleading confidence sets, and I demonstrate that two-step confidence sets based on the first stage F-statistic can have extremely poor coverage in linear instrumental variables models with heteroskedastic errors. I introduce a simple approach to detecting weak identification and constructing two-step confidence sets which controls coverage distortions. In the third chapter, joint with Anna Mikusheva, we consider minimum distance statistics and show that in a broad class of models the problem of testing under weak identification is closely related to the problem of testing a "curved null" in a finite-sample Gaussian model. Using the curvature of the model, we develop new finite-sample bounds on the distribution of minimum-distance statistics, which we show can be used to detect weak identification and to construct tests robust to weak identification.
Download or read book Essays on Identification and Weak Identification written by Linchun Chen and published by . This book was released on 2014 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: My doctoral dissertation aims to study several issues on identification and weak identification, with applications in linear instrumental variables (IV) models and transformation models. Chapter 1 is joint with Patrik Guggenberger, Frank Kleibergen and Sophocles Mavroeidis, which considers tests of a simple null hypothesis on a subset of the coefficients of the exogenous and endogenous regressors in a single-equation linear IV model with potentially weak identification. Existing methods of subset inference (i) rely on the assumption that the parameters not under test are strongly identified, or (ii) are based on projection-type arguments. We show that under homoskedasticity the subset Anderson and Rubin (1949) test, which replaces unknown parameters by limited information maximum likelihood (LIML) estimates has correct asymptotic size without imposing additional identification assumptions, but that the corresponding subset Lagrange multiplier (LM) test is size distorted asymptotically. Subsequently, Chapter 2, joint with Qihui Chen and Patrik Guggenberger, derives the asymptotic size of the corresponding subset LM test, and shows it is size distorted. We provide the smallest nonrandom size corrected (SC) critical value that ensures that the resulting "SC subset LM test" has correct asymptotic size. We introduce an easy to implement generalized moment selection plug-in SC subset LM test ("GMS-PSC subset LM test" from now on) that uses a data-dependent critical value that gives correct asymptotic size. Chapter 3 focuses on transformation models. It provides sufficient conditions for transformation models with endogenous regressors H(Y) =X[beta]+U to be identified under conditional moment restrictions, E(U/Z)=0, where Z is the IV for X. Allowing observables (X, Y, Z) and unobservable U to be high-dimensional, we show that the assumption of completeness suffices for identification. Based on the identification results, we propose to apply the penalized sieve minimum distance estimator (ĥ[beta]̂ in Chen and Pouzo (2009) with possible shape constraints to estimate (ĥ[beta]̂. Demand model of differentiated products markets is considered as an application of transformation models, and we provide the identification and PSMD estimation results for its parameters.
Download or read book Essays on Weak Identification and Cointegrating Rank Selection written by Xu Cheng and published by . This book was released on 2010 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Essays on Weak Identification in High dimensional Models with Applications in Macroeconomics written by Max-Sebastian Dovì and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Essays in Honour of Fabio Canova written by Juan J. Dolado and published by Emerald Group Publishing. This book was released on 2022-09-16 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Both parts of Volume 44 of Advances in Econometrics pay tribute to Fabio Canova for his major contributions to economics over the last four decades.
Download or read book Essays on Forecast Evaluation Under General Loss Functions written by Carlos Capistran Carmona and published by . This book was released on 2005 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Essays on Weak Identification Model Selection and Hypothesis Testing in Econometrics written by Purevdorj Tuvaandorj and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis makes contributions to weak identification, modelselection and hypothesis testing in econometrics. It consists of thefollowing essays.In Chapter 1, we study likelihood-basedinference in models with possible identification failure. The results relyheavily on the properties of the mapping from structural parameters togeneralized reduced-form parameters (which are identified by construction).We establish an asymptotic chi-square bound on the likelihood ratio (LR)statistic for testing restrictions on the possibly unidentified structuralparameters with degrees of freedom equal to the dimension of the reducedform parameter vector through which the tested parameters enter thelikelihood function. We also propose pivotal C(alpha)-type statisticsthat are robust to potential identification failure and are flexible inincorporating a wide class of estimators of the (strongly identified)nuisance parameters. Furthermore, we develop a generalized version of theclassical Anderson-Rubin (AR)-type statistic in linear simultaneousequations and an identification-robust pretest-based inference procedure.In Chapter 2, we study the invariance properties of various test criteria which have been proposed for hypothesis testing in the context of incompletely specified models, such asmodels which are formulated in terms of estimating functions (Godambe, 1960, Ann. Math. Stat.) or moment conditions and are estimated bygeneralized method of moments (GMM) procedures (Hansen, 1982, Econometrica), and models estimated by pseudo-likelihood (Gourieroux,Monfort and Trognon, 1984, Econometrica) and M-estimation methods.The invariance properties considered include invariance to (possiblynonlinear) hypothesis reformulations and reparameterizations. The teststatistics examined include Wald-type, LR-type, LM-type, score-type, and C(alpha)-type criteria. In Chapter 3, we propose generalized C(alpha) tests for testing linear and nonlinear parameterrestrictions in models specified by estimating functions. The asymptotic distribution of theproposed statistic is established under weak regularity conditions. We show that earlierC(alpha)-type statistics are included as special cases. The problem of testing hypotheses fixinga subvector of the complete parameter vector of the model is discussed in detail. In Chapter 4, we consider conditional distribution and conditional density functionalsin the space of generalized functions. We obtain the limit of the kernel estimators for weakly dependent data, evenunder non-differentiability of the distribution function; the limit Gaussian process is characterizedas a stochastic random functional (random generalized function) on the suitablefunction space. An alternative simple to compute estimator based on the empirical distribution function is proposed for the generalized random functional. For test statistics based on this estimator, limit properties are established.Chapter 5, considers the issue of selecting the number of regressors and the numberof structural breaks in multivariate regression models in the possible presence of multiplestructural changes. We develop a modified Akaike's information criterion (AIC), amodified Mallows' Cp criterion and a modified Bayesian information criterion (BIC). Thepenalty terms in these criteria are shown to be different from the usual terms." --
Download or read book Essays in Econometrics written by Laura Chioda and published by . This book was released on 2005 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification and Inference for Econometric Models written by Donald W. K. Andrews and published by Cambridge University Press. This book was released on 2005-06-17 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 2005 collection pushed forward the research frontier in four areas of theoretical econometrics.
Download or read book Essays on Descartes written by Paul Hoffman and published by Oxford University Press. This book was released on 2009-04-17 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a collection of Paul Hoffman's wide-ranging essays on Descartes composed over the past twenty-five years. The essays in Part I include his celebrated "The Unity of Descartes' Man," in which he argues that Descartes accepts the Aristotelian view that soul and body are related as form to matter and that the human being is a substance; a series of subsequent essays elaborating on this interpretation and defending it against objections; and an essay on Descartes' theory of distinction. In the essays in Part II he argues that Descartes retains the Aristotelian theory of causation according to which an agent's action is the same as the passion it brings about, and explains the significance of this doctrine for understanding Descartes' dualism and physics. In the essays in Part III he argues that Descartes accepts the Aristotelian theory of cognition according to which perception is possible because things that exist in the world are also capable of a different way of existing in the soul, and he shows how this theory figures in Descartes' account of misrepresentation and in the controversy over whether Descartes is a direct realist or a representationalist. The essays in Part IV examine Descartes' theory of the passions of the soul: their definition; their effect on our happiness, virtue, and freedom; and methods of controlling them.
Download or read book Selected Essays written by William Troy and published by Rutgers University Press. This book was released on 1967 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes critical essays on Henry James, Virginia Woolf, James Joyce, D.H. Lawrence, Gertrude Stein, F. Scott Fitzgerald, Stendhal, Balzac, Marcel Proust, Andre Malraux, Paul Valery, Thomas Mann, William Shakespeare (Antony and Cleopatra), and other topics.
Download or read book Cape Communication Studies Practical Exercises for Paper 02 Essays written by EDLIN D. ROCHFORD and published by iUniverse. This book was released on 2015-10-09 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: CAPE Communication Studies: A Practical Guide to Paper 02 Essays has been a long time in the making but I just knew that I had to write this book for students who are looking for guidance in writing their best essays of CAPE Communication Studies Paper 02. This book is guaranteed to show you how to: identify the writers main point, purpose, organizational strategies and language techniques of Module One essay articulate with confidence the factors that make up the Module Two essay know what you are required to write in the Module Three essay As the title suggests this book allows you to participate in various activities all geared to perfecting your essay writing skills needed for all three essays in Paper 02. In each section of the book you are invited to work either as an individual, in pairs or in groups to complete the activities that are specifically designed to deepen your understanding of CAPE essays. This concise work possesses all that students need to thoroughly prepare for and pass this section of their CAPE Communication Studies examination.
Download or read book Brilliant Essays written by Ursula Hackett and published by Bloomsbury Publishing. This book was released on 2020-11-17 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ursula Hackett's tried-and-tested approach for essay success helps students to create brilliant, original, high-scoring essays that are enjoyable to write – and read. With dozens of hands-on exercises and clear examples, Brilliant Essays begins with students' everyday experience of using language, arguing a case, reading, thinking, and communicating with other people. Chapters help students to examine – and dispel – assumptions, build and control their arguments and use evidence effectively, in written assignments and timed exams. The final chapter provides clear, no-nonsense answers to frequently asked questions raised by Ursula's students at Royal Holloway, University of London and the University of Oxford and via her YouTube channel and website. Whichever subject your students study, Brilliant Essays will take them beyond the basics and give them the tools to reach their academic potential.
Download or read book The Structured Essay written by Mary Michael Spangler and published by Wipf and Stock Publishers. This book was released on 2002-03-18 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Essays on the Prediction Process written by Frank B. Knight and published by IMS. This book was released on 1981 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Essays on the Christian Worldview and Others Political Literary and Philosophical written by Andrew J. Schatkin and published by University Press of America. This book was released on 2012-07-10 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection of essays and thoughts covers such areas as basic Christian thought, which includes traditional family morality and a great concern for alleviating poverty and promoting social justice, political thought comparing the need for a system which includes both socialist and capitalist elements, and the need for values in our society, which has come to emphasize money, power, and greed as philosophical goals and values, though they are not. The book also has thoughts concerning literature, a consideration of what constitutes true progress, the denial in our society of any absolute moral truth, and the substitution of moral relativism as a mistaken ethical system.
Download or read book Business School Essays That Made a Difference 5th Edition written by Princeton Review and published by Princeton Review. This book was released on 2012-09-15 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Real essays written by MBA hopefuls-with commentary from admissions experts
