S. J. Carta Abierta

CR_1870-Arenal.ing_PLANTILLA CARTA DIRECTOR

Cystic pneumatosis intestinalis is a rare benign entity, characterized by intramural cysts located mainly in the intestinal wall. The etiology has not yet been elucidated, but generally it is associated with a systemic disease (1-4). Colonic pneumatosis represents about 30% of gastrointestinal cases (1). We present the case of a young girl with anorexia who underwent surgical treatment for cyst...

Carta al editor.

S - J . Vick , D . Bovet & J . R . Anderson

The ability to discriminate between pairs of photographs according to the portrayed model’s visual attention status was examined in four olive baboons. Two baboons successfully managed to solve the problem, even when attention was demonstrated by eye direction alone. A third showed an ability to discriminate head direction but not eye direction. In order to investigate further their ability to ...

Abstract (jel Classification Code(s): J 31, J 71)

JEL Classification Code(s): J 31, J 71) "Perceptions of Discrimination, Effort to Obtain Psychological Balance, and Relative Wages: Can We Infer a Happiness Gradient?" There is a substantial literature that finds a linkage between happiness and relative economic well being as measured by earnings or wages. There is also a well documented racial gap in wages. One explanation for this is disparat...

بررسی اثر منحنی‌های J و S در اقتصاد ایران (1386-1355)

هدف اصلی این مطالعه بررسی تأثیر تنزل ارزش پول ملی (افزایش نرخ مؤثر واقعی ارز) بر تراز تجاری ایران در چارچوب منحنی‌های J و S طی سال‌های (1386-1355) می‌باشد. در این راستا اثر منحنی J در بلندمدت به روش هم‌انباشتگی جوهانسن - جوسلیوس مورد بررسی قرار گرفته و از توابع عکس‌العمل آنی و منحنی S برای تبیین اثرات کوتاه‌مدت بین تغییرات نرخ مؤثر واقعی ارز و تراز تجاری استفاده شده است. نتایج حاصل از تخمین مدل...