Colección de obras selectas del clero contemporaneo del Perú, con biografía de los autores y varios documentos interesantes sobre el estado de la santa iglesia del Perú

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Officia votiva per annum pro singulis hebdomadae feriis a ss. D. N.Leone PP. XIII per decretum urbis et orbis

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Officium in festo et per octavum Corporis Christi juxta ordinem breviarii et missalis romani ad normam

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Officium in festo Pentecostes et per totam actavum secundum missaleet breviarium romanum

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Breviarium romanum ex decreto ss. concilii tridentini restitutum, s.PII V. Pontificis Maximi Jussu editum, Clementis VIII. et Urbani VIIIauctoritate restitutum, cum officiis sanctorum novissime per summos pontifices usque ad hanc diem concessis.

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Manuale completo per apparecchiare i giovanetti alla prima comunione: istruzioni, meditazioni,fervorini, discorsi analoghi,cantici musicati,avvertenze ecc

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Tratado unico y singular del origen de los indios del Perú, Méjico, Santa Fe y Chile

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Historia de la Guerra de América, entre Chile, Perú y Bolivia

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Historia de la conquista del Perú; precedida de una ojeada sobre la civilización de los Incas

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Apuntes Históricos del Perú. Noticias cronolológicas del Cuzco

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Projection-Based Statistical Inference in Linear Structural Models with Possibly Weak Instruments

It is well known that standard asymptotic theory is not valid or is extremely unreliable in models with identification problems or weak instruments [Dufour (1997, Econometrica), Staiger and Stock (1997, Econometrica), Wang and Zivot (1998, Econometrica), Stock and Wright (2000, Econometrica), Dufour and Jasiak (2001, International Economic Review)]. One possible way out consists here in using a variant of the Anderson-Rubin (1949, Ann. Math. Stat.) procedure. The latter, however, allows one to build exact tests and confidence sets only for the full vector of the coefficients of the endogenous explanatory variables in a structural equation, which in general does not allow for individual coefficients. This problem may in principle be overcome by using projection techniques [Dufour (1997, Econometrica), Dufour and Jasiak (2001, International Economic Review)]. AR-types are emphasized because they are robust to both weak instruments and instrument exclusion. However, these techniques can be implemented only by using costly numerical techniques. In this paper, we provide a complete analytic solution to the problem of building projection-based confidence sets from Anderson-Rubin-type confidence sets. The latter involves the geometric properties of “quadrics” and can be viewed as an extension of usual confidence intervals and ellipsoids. Only least squares techniques are required for building the confidence intervals. We also study by simulation how “conservative” projection-based confidence sets are. Finally, we illustrate the methods proposed by applying them to three different examples: the relationship between trade and growth in a cross-section of countries, returns to education, and a study of production functions in the U.S. economy.

Identification, Weak Instruments and Statistical Inference in Econometrics

We discuss statistical inference problems associated with identification and testability in econometrics, and we emphasize the common nature of the two issues. After reviewing the relevant statistical notions, we consider in turn inference in nonparametric models and recent developments on weakly identified models (or weak instruments). We point out that many hypotheses, for which test procedures are commonly proposed, are not testable at all, while some frequently used econometric methods are fundamentally inappropriate for the models considered. Such situations lead to ill-defined statistical problems and are often associated with a misguided use of asymptotic distributional results. Concerning nonparametric hypotheses, we discuss three basic problems for which such difficulties occur: (1) testing a mean (or a moment) under (too) weak distributional assumptions; (2) inference under heteroskedasticity of unknown form; (3) inference in dynamic models with an unlimited number of parameters. Concerning weakly identified models, we stress that valid inference should be based on proper pivotal functions —a condition not satisfied by standard Wald-type methods based on standard errors — and we discuss recent developments in this field, mainly from the viewpoint of building valid tests and confidence sets. The techniques discussed include alternative proposed statistics, bounds, projection, split-sampling, conditioning, Monte Carlo tests. The possibility of deriving a finite-sample distributional theory, robustness to the presence of weak instruments, and robustness to the specification of a model for endogenous explanatory variables are stressed as important criteria assessing alternative procedures.

Lucia di Lammermoor : dramma tragico in tre atti, rappresentato per la prima volta al teatro San Carlo di Napoli il 26 settembre 1835

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Sistema cromático de notación musical : enseñanza de la música por medio de los colores del espectro solar ; notable invento mexicano del profesor Longinos Cadena

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Cartilla o elementos musicales considerada la música en su ejecución o arte compuesto y dedicada a los profesores de música de esta ciudad

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