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Bibliographic Details
Main Author:	Germán A. de la Reza
Format:	Artículo científico
Language:	es
Published:	Universidad Nacional Autónoma de México 2010
Subjects:	Economía y Finanzas Reglas de origen protección comercial costo administrativo comercio preferencial disparidades salariales
Online Access:	https://www.redalyc.org/articulo.oa?id=11820132004
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REGLAS DE ORIGEN Y SUS PRINCIPALES EFECTOS: UNA REVISIÓN FORMAL DEL ARGUMENTO ESTÁNDAR Germán A. de la Reza Jaar J. Kowalsky Economía y Finanzas Reglas de origen protección comercial costo administrativo comercio preferencial disparidades salariales El presente artículo examina las hipótesis sobre el carácter proteccionista de las reglas de origen preferenciales. Con ese fin substancia la capacidad analítica de dos variables ignoradas por el argumento estándar. a) el salario y su predominio en la explicación del reemplazo de proveedores de productos intensivos en mano de obra. y b) el costo administrativo provocado por la superposición de regímenes de origen. En cada caso se formalizan las extensiones y se delimitan sus consecuencias teóricas. 2010 artículo científico 0301-7036 https://www.redalyc.org/articulo.oa?id=11820132004 es http://www.redalyc.org/revista.oa?id=118 Problemas del Desarrollo. Revista Latinoamericana de Economía application/pdf Universidad Nacional Autónoma de México Problemas del Desarrollo. Revista Latinoamericana de Economía (México) Num.160 Vol.41

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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