60 https://www.uni-bremen.de/fb12/irregular-migration/methodology/stock-tables research project CLANDESTIO: Methodology – Stock tables de Universität Bremen Sun, 09 Aug 2026 23:58:44 +0200 Sun, 09 Aug 2026 23:58:44 +0200 Universität Bremen content-221909 Wed, 04 Mar 2026 23:43:54 +0100 https://www.uni-bremen.de/fb12/irregular-migration/methodology/stock-tables#c221909 <p><strong>Template for presentation of stock estimates</strong></p> <table cellpadding="1" cellspacing="1"> <tbody> <tr> <td> <p>Groups</p> </td> <td> <p>Definition</p> </td> <td> <p>Year</p> </td> <td> <p>Estimate</p> </td> <td> <p>Main data source</p> </td> <td> <p>Short explanation</p> </td> <td> <p>Reference</p> </td> </tr> <tr> <td> <p><strong>Total stocks</strong></p> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> <p><strong>Gender composition</strong></p> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> <p><strong>Age composition</strong></p> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> <p><strong>Nationality composition</strong></p> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> <p><strong>Economic sector composition</strong></p> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td> <p><strong>Other subgroups</strong></p> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> </tbody> </table> <hr /> <h3>GROUPS (TABLE ROWS)</h3> <p>Stock estimates refer to the total number of irregular foreign residents (IFR) or irregular foreign workers (IFW) in a country at a specific point of time. Each table consists of estimates of absolute numbers and of indicators for the composition with regard to gender, age, nationality, and sector of economic activity. All relative indicators are percentages of the groups in the total IFR or IFW population and thus should add up to 100%.</p> <ul> <li>Total stocks: total stocks of irregular foreign residents or workers (for the whole country or specific cities or regions). </li> <li>Gender composition: absolute estimates, or estimated percentage of men and women.</li> <li>Age composition: absolute estimates, or estimated percentage of age groups: 0-14 years (children); 15-60 (youth and persons in main working age);  60 and older (persons in or close to retirement age).</li> <li>Nationality composition: absolute estimates individual nationalities, or estimated percentage of nationalities, sorted in order of quantitative relevance.</li> <li>Economic sector composition: absolute estimates for individual sectors, or estimated percentage of sectors, sorted in order of quantitative relevance. Indicators differ strongly with regard to sector definition and specification. 'Private household employment' was summarized as one sector.</li> <li>Other subgroups: open category for any estimate about groups of specific concern. It was suggested that these estimates could concern former asylum seekers, refugees or prostitutes, but any subgroup of irregular migrants for which an estimate exists could be added under this heading.</li> </ul> Content