In this paper we investigate the properties of the Lagrange Multiplier (LM) test for autoregressive conditional heteroskedasticity (ARCH) and generalized ARCH (GARCH) in the presence of additive outliers (AO's). We show analytically that both the asymptotic size and power are adversely aaected if AO's are neglected: the test rejects the null hypothesis of homoskedasticity too often when it is i...

INTRODUCTION No cases of equine infectious anaemia (EIA) have been reported in Spain since 1983. Factors that could increase the risk of reintroducing equine infectious anaemia virus (EIAV) into Spain include the recent occurrence of the disease in Europe and the absence of compulsory serological testing before importation into Spain. AIMS AND OBJECTIVES Given the importance of the Spanish Pu...

In this paper we investigate the properties of the Lagrange Multiplier LM test for autoregressive conditional heteroskedasticity ARCH and generalized ARCH GARCH in the presence of additive outliers AO s We show an alytically that both the asymptotic size and power are adversely a ected if AO s are neglected the test rejects the null hypothesis of homoskedasticity too often when it is in fact tr...

BACKGROUND Hispanic individuals compose the fastest growing minority group in the United States, yet little is known about how language impacts their health care. The primary objective of this study was to determine whether the inability to speak English adversely affected glycemic control in Hispanic patients with type 2 diabetes mellitus. METHODS This retrospective cohort study selected 183...

Brief History of Immigration to the U.S. Hispanic1 immigration to the United States started with Columbus’ rediscovery of the continent on October 12, 1492. The first post Columbus settlements in current U.S. territory were highly religious communities. A bull by Pope Alexander VI (1493) ordered the partitioning of America and summoned early Spanish immigrants “to instruct the inhabitants in th...

This study examines the variation in surname analysis and geocoding, and their association with self-identified Hispanics in an HMO. We collected ethnicity data from three studies, and employed Spanish surname software and census tract level geocoding to create proxies for Hispanic ethnicity. We computed sensitivity, specificity, and estimated multivariate logistic regression models to examine ...

This study reviews the blood pressure (BP) determinations previously recorded in a primary care center serving a low socioeconomic population and compares the systolic blood pressure (SBP) and diastolic blood pressure (DBP) distributions within the clinic population among the three major ethnic groups represented, and also between this clinic population and a recently reported standard populati...