Improved estimators in some linear errors-in-variables models in finite samples

The paper uses a Monte Carlo study to demonstrate the dominance under mean squared errors or quadratic loss of a new improved estimator for some linear errors-in-variables models in finite samples. The new estimator is non-linear and biased in a conventional sense and has a smaller risk than the least squares and the Stein estimators. Standard errors for this estimator can be conveniently obtained by bootstrapping methods.     

Should Australia be concerned by Beijing’s trade threats: modelling the economic costs of a restriction on imports of Australian coal

A country’s economic dependence on its trade with various other countries is often expressed in terms of trade values and shares. A country’s vulnerability to economic coercion by the countries with which it trades is similarly expressed in such terms. Using the recent issues relating to Australia’s coal trade with China as an example, we propose a better framework for assessing vulnerability to coercive trade instruments. We argue that the capacity for a given export trade to fund real consumption is a superior indicator of economic vulnerability than the simple value of the underlying trade flow. Our framework takes account of trade diversion, foreign capital ownership, the terms of trade, resource mobility, and capital and production tax rates. Using this framework, we demonstrate that the damage from trade sanction is far less than might be expected from a simple focus on the value of the affected trade flow alone.     

Medium,message and advertising effectiveness in the Greek processed meats industry

This paper examines the effectiveness of advertising in the fast-growing Greek processed meats sector using an unbalanced panel data set of 34 firms during the period 1983–1997. In analysing the relationship between firms' sales and advertising this study differentiates between the type/content of the advertising message and the medium used to communicate it. Advertising expenditures are disaggregated into company and product campaigns in television, radio, and print media. Empirical results strongly reject the hypothesis of homogeneous consumer response to all kinds of advertising that is implicit in studies that aggregate advertising expenditures. The results also indicate an inefficient allocation of advertising resources by the firms of the sector; advertising in the least utilized print media was determined to be by far the most effective strategy during the study period.     

Medical consumption over the life-cycle

We investigate the association between age and medical spending in the U.S. using data from the Medical Expenditure Panel Survey. We estimate a partially linear seminonparametric model and construct “pure” life-cycle profiles of health spending simultaneously controlling for time effects (i.e., institutional changes and business cycles effects) and cohort effects (i.e., generation specific conditions). We find that time and cohort effects together introduce a significant estimation bias into predictions of health expenditures per age group, especially for individuals older than 60 years. The estimation bias introduced by cohort effects increases monotonically with age while the bias due to time effects is not significant. The overall effect of Medicare on the cohort and time effects biases is negligible.     

The long-run relationship of gold and silver and the influence of bubbles and financial crises

This paper analyzes the long-run relationship between gold and silver prices. We closely follow Escribano and Granger (J Forecast 17:81–107, 1998) and extend their study. We use a longer sample period from 1970 to 2011 and study the role of bubbles and financial crises for the relationship between gold and silver prices. We find clear evidence for a co-integration relationship between gold and silver with gold prices driving the relationship. The analysis also indicates that the results are influenced by bubble-like episodes and financial crises.     

Cost-effectiveness of Access to Critical Cerebral Emergency Support Services (ACCESS): a neuro-emergent telemedicine consultation program

Aims: Access to Critical Cerebral Emergency Support Services (ACCESS) was developed as a low-cost solution to providing neuro-emergent consultations to rural hospitals in New Mexico that do not offer comprehensive stroke care. ACCESS is a two-way audio-visual program linking remote emergency department physicians and their patients to stroke specialists. ACCESS also has an education component in which hospitals receive training from stroke specialists on the triage and treatment of patients. This study assessed the clinical and economic outcomes of the ACCESS program in providing services to rural New Mexico from a healthcare payer perspective.

Methods: A decision tree model was constructed using findings from the ACCESS program and existing literature, the likelihood that a patient will receive a tissue plasminogen activator (tPA), cost of care, and resulting quality adjusted life years (QALYs). Data from the ACCESS program includes emergency room patients in rural New Mexico from May 2015 to August 2016. Outcomes and costs have been estimated for patients who were taken to a hospital providing neurological telecare and patients who were not.

Results: The use of ACCESS decreased neuro-emergent stroke patient transfers from rural hospitals to urban settings from 85% to 5% (no tPA) and 90% to 23% (tPA), while stroke specialist reading of patient CT/MRI imaging within 3?h of onset of stroke symptoms increased from 2% to 22%. Results indicate that use of ACCESS has the potential to save $4,241 ($3,952–$4,438) per patient and increase QALYs by 0.20 (0.14–0.22). This increase in QALYs equates to ～73 more days of life at full health. The cost savings and QALYs are expected to increase when moving from a 90-day model to a lifetime model.

Conclusion: The analysis demonstrates potential savings and improved quality-of-life associated with the use of ACCESS for patients presenting to rural hospitals with acute ischemic stroke (AIS).     

Economic growth and balance-of-payments constraint in Vietnam

Abstract

Our paper examines the long-run relation between economic growth and current account equilibrium in Vietnam, using a multicountry balance-of-payments-constrained growth model. We find that for the whole sample (1985–2010) Vietnam grew less than the rate predicted by the model. We also find that the balance-of-payments-constrained growth rate shifted after the 1997 Asian crisis. Since the relative price effect is neutral, the volume effects dominate in setting the balance-of-payments constraint. On the one hand, owing to the high income elasticities of exports, growth in advanced countries has a strong multiplier effect on the Vietnamese economy. On the other hand, this effect is hindered by a strong “appetite” for imports coming from Asia. Finally, we assess the impact of the current crisis on Vietnam’s growth for the period 2011 to 2017.     

Causality and wage price inflation in West Germany 1964–1979

Zusammenfassung Kausalit?t und Lohn-Preis-Inflation in Westdeutschland 1964–1979. — In diesem Aufsatz wird ein Vierteljahresmodell der Lohn- und PreisInflation in Westdeutschland (1964 bis 1978) entwickelt. Es verwendet das Konzept der Phillips-Kurve, betont aber die überprüfbare Lohndruck-Hypothese und enth?lt die folgenden sechs Variablen: Konsumentenpreise, Effektivl?hne, Streiks, Tarifl?hne, Nachfrage nach Arbeitskr?ften und die Geldmenge M 1. Mit Hilfe des Konzepts der Wiener-Granger-Kausalit?t und kürzlich entwickelter Methoden der multivariaten Zeitreihenanalyse entsteht ein empirisches Kausalit?tsmodell der Lohn-Preis-Inflation für Westdeutschland. Dieses Modell stützt in starkem Ma\e die Lohndruck-Theorie und weist der Geldversorgung eine unbedeutende Rolle zu. Eine zweiseitige Kausalit?t besteht zwischen den Effektiv- und den Tarifl?hnen, so da\ es unangebracht ist, zeitlich verteilte Lags anzunehmen für die Tarifl?hne in der Lohngleichung oder umgekehrt für die Effektivl?hne in der Gleichung der Tarifl?hne. W?hrend sich als Hauptursache der Lohninflation die Inflationserwartungen und die Tarifl?hne identifizieren lassen, geh?ren zu den wichtigsten Ursachen der Preisinflation die erwarteten Preissteigerungen und die Erh?hung der Kapazit?tsauslastung.

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Résumé Causalité et l’inflation de prix et de salaire en Allemagne de l’Ouest 1964–1979. — Dans cet article l’auteur formule un modèle trimestriel de l’inflation de salaire et de prix pour l’Allemagne de l’Ouest sur la période de 1964.1 à 1978.4. Le modèle utilise les éléments fondamentaux de la courbe de Phillips, mais souligne l’hypothèse testable des déterminants de ?wage-push? et consiste de six variables économiques principales: les prix de consommation, les salaires nominaux, les grèves, les salaires contractuels minimum, la demande de la main-d’oeuvre et les disponibilités monétaires (M1). L’auteur applique le concept de causalité de Wiener-Granger aussi bien que des méthodes des séries chronologiques multivariates développées récemment et obtient un modèle empirique de causalité. Le modèle fortement supporte la théorie de ?wage-push? et révèle un r?le insignifiant des disponibilités monétaires. Une causalité deux-voies peut être observée entre les salaires nominaux et les salaires contractuels minimum. Par conséquent, il n’est pas indiqué de spécifier une structure des décalages retards distribués pour les salaires contractuels dans l’équation de salaire ou, qui est équivalent, pour les salaires nominaux dans l’équation de salaires contractuels minimum. Pendant que l’inflation anticipée et les salaires contractuels sont regardés comme les causes principales de l’inflation de salaire les facteurs décisifs de l’inflation de prix incluent les augmentations des prix attendues et l’augmentation de l’utilisation des capacités.

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Resumen Causalidad e inflation salarios-precios en Alemania Occidental 1964–1979. — En este artícule se formula un modelo trimestral de inflatión de salarios y precios para Alemania Occidental en el período 1964.1 a 1978.4. Este modelo se basa en la racionalidad de la curva de Phillips pero pone enfasis en la hipótesis comprobable de determinantes de presión de salarios y consiste de seis variables económicas importantes: precios al consumidor, salarios monetarios, huelgas, tasas de salarios mínimos negociados, demanda por trabajo y oferta de dinero M1. Usando el concepto de causalidad Wiener-Granger y métodos de series de tiempo multivariables desarrollados recientemente se obtiene un modelo empérico causal de inflatión salarios precios para Alemania Occidental. Este modelo da fuerte apoyo a la teoría de presión de salarios y revela un papel insignificante para la oferta de dinero. Hay una doble causalidad (o de feedback) presente entre salarios monetarios y tasas salariales minimas negociadas y, tomo tal, la práctica de especificar una estructura de rezago distribuida para estas tasas salariales en la ecuación de salarios, o equivalentemente, para salarios monetarios en la ecuación de tasas salariales mínimas negociadas es inapropiada. Mientras que las principales causas de la inflatión salarial se pueden identificar como inflatión anticipada y tasas salariales mínimas negociadas, las principales causas de la inflatión de precios incluyen aumentos de precios esperados y el aumento de la capacidad utilizada.