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Main Author:	MARÍA JESÚS DELGADO RODRÍGUEZ
Format:	Artículo científico
Language:	es
Published:	Universidad de Zaragoza 2004
Subjects:	Economía y Finanzas eficiencia técnica frontera estocástica Equipamientos de infraestructuras
Online Access:	https://www.redalyc.org/articulo.oa?id=96918123004
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INFRAESTRUCTURAS Y EFICIENCIA TÉCNICA: UN ANÁLISIS DE TÉCNICAS FRONTERA MARÍA JESÚS DELGADO RODRÍGUEZ INMACULADA ÁLVAREZ AYUSO Economía y Finanzas eficiencia técnica frontera estocástica Equipamientos de infraestructuras Este trabajo amplía la evidencia sobre la contribución de las infraestructuras a la producción privada de las regiones españolas al explorar distintos canales de influencia y diferenciar sus efectos sobre los sectores productivos y entre tipos de equipamientos. Para ello se plantea un modelo de frontera de producción estocástica que tiene como objetivo analizar el papel de las infraestructuras como input productivo y como determinante de los niveles de eficiencia técnica alcanzados. Además, se han utilizado unidades físicas para alcanzar una medida de este capital ofreciendo un enfoque alternativo para cuantificar estos equipamientos. Los resultados confirman una notable contribución de las infraestructuras a la producción privada y su influencia positiva sobre la eficiencia de las regiones españolas. Destaca también la importancia de la composición del capital público y el efecto especialmente relevante en los sectores de industria y servicios destinados a la venta. 2004 artículo científico 1133-455X https://www.redalyc.org/articulo.oa?id=96918123004 es http://www.redalyc.org/revista.oa?id=969 Revista de Economía Aplicada application/pdf Universidad de Zaragoza Revista de Economía Aplicada (España) Num.35 Vol.XII

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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