The health emergency due to the Covid-19 pandemic -and the measures of social distancing and confinement implemented-have boosted telework as well as the debate on its implementation and benefits. Based on the results of a survey carried out in the first weeks of confinement in Spain, this article explores the mechanisms to control work performance of people teleworking and its incidence based on certain individual, organizational and sectoral variables. The results show the transfer of practices typical of face-to-face work to remote work, which, combined with the monitoring of results and the absence of working time recording, can lead to problems in guaranteeing the right to disconnection. The results are complemented by a discussion of the existing literature on telework control and analysis of recent regulatory changes in relation to the telework, the flexible work and the right to disconnect.

The extension of artificial intelligence (AI) and algorithmic management mechanisms by companies has led to growing trade union demands to regulate their use. This article explores the role of collective bargaining and employee participation mechanisms in regulating the use by companies of AI and algorithms. This is done through a comparative analysis of institutional developments at EU level, as well as in four countries with different industrial relations models (Denmark, Germany, Hungary and Spain). The article shows that there are remarkable differences between countries in the roles of social partners and in the combination of protective and participative mechanisms used to respond to the challenges of AI and algorithmic management. However, the analysis also serves to highlight the limits of existing institutions and practices to cope with the complexity of challenges associated with AI and algorithmic management. This calls for institutional adaptation and additional regulatory efforts at EU and national levels to support collective bargaining.

ResumenLa posibilidad de movilidad ascendente de la población inmigrante es un factor importante a la hora de explicar su integración social. Asimismo, a nivel individual, la expectativa de movilidad puede contribuir a aumentar o disminuir la incertidumbre socioeconómica. El objetivo de este artículo es analizar la movilidad ocupacional vertical de la inmigración. Tratamos de explicar cuales son las variables clave en el acceso de los inmigrantes a los salarios altos. Una regresión logística nos permite ver como interactúan las variables individuales, como la antigüedad y el nivel de estudios, con las variables estructurales, como el tamaño de la empresa y el sector de actividad. Además, un análisis factorial de correspondencias múltiples nos permite agrupar todas las variables y ofrecer una tipología que clasifica las trayectorias laborales con arreglo a la segmentación del mercado de trabajo. Palabras clave: inmigración; movilidad ocupacional; trayectorias; capital humano; segmentación; salarios; antigüedad; contrato de trabajo; empresa; sector de actividad; asimilación ocupacional. Abstract. Upward Occupational Mobility of Immigrant Workers in Spain: Assimilation or Occupational Segmentation?Possibilities for occupational mobility are an important factor in the explanation of the integration of immigrant workers into receiving societies. Moreover, at the individual level, the prospects for upward occupational mobility determine the uncertainty facing immi-1. Esta investigación forma parte del Proyecto Gusto (SHH-CT, 2009-225301) del VII Programa Marco de la Comisión Europea. La fuente de información de la MCVL ha sido explotada para el proyecto "Emigració, ocupació i cohesió social", financiado por la Fundació La Caixa, convenio 10984. Expresamos nuestro agradecimiento a los comentarios de

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