TY - JOUR A1 - Kohler, Ulrich A1 - Post, Julia Charlotte T1 - Welcher Zweck heiligt die Mittel? T1 - Which Ends Justify the Means? BT - Bemerkungen zur Repräsentativitätsdebatte in der Umfrageforschung BT - Comments on the Usability of Non-Probability Samples for Opinion Polls JF - Zeitschrift für Soziologie N2 - Im Vergleich zu Umfragen an Wahrscheinlichkeitsstichproben bieten Umfragen an Access-Panels, die auf Nicht-Wahrscheinlichkeitsstichproben basieren, unbestreitbare wirtschaftliche Vorteile. Diese Vorteile gehen jedoch mit unvermeidbaren Qualitätseinbußen einher, die auch dann bestehen bleiben, wenn Erstere sehr niedrige Responseraten haben. Daher müssen die wirtschaftlichen Vorteile und die methodischen Einschränkungen gegeneinander abgewogen werden. Es wird argumentiert, dass diese Abwägung anhand normativer Festlegungen erfolgen muss. Unter Anwendung der hier vorgeschlagenen Maßstäbe kommt der Beitrag zu dem Schluss, dass die Qualitätsansprüche an über Massenmedien verbreitete Meinungsumfragen höher sein sollten als für rein (sozial)wissenschaftliche Zwecke. N2 - Compared with surveying respondents of a probability sample, surveying members of a self-selective custom online panel offers indisputable economic advantages. However, these advantages come with an unavoidable drop in quality. This disadvantage holds true even in comparison to probability sampling surveys with very low response rates. Therefore, it is necessary to balance the economic advantages against the methodological limitations. We argue that this consideration needs to be done according to normative determinations. Using the criteria proposed in this article, we conclude that public opinion research distributed through mass media should have higher quality standards than research with solely scientific purposes. KW - Umfragen KW - Meinungsumfragen KW - Repräsentativität KW - Wahrscheinlichkeitsstichproben KW - Nicht-Wahrscheinlichkeitsstichproben KW - Unit-Nonresponse KW - Selbstselektion KW - Responseraten KW - Online-Access-Panel KW - Surveys KW - Public Opinion Research KW - Polls KW - Representativeness KW - Survey Inference KW - Probability Sampling KW - Non-probability Sampling KW - Unit Nonresponse KW - Self-selection KW - Response Rates KW - Custom Online Panel Y1 - 2023 U6 - https://doi.org/10.1515/zfsoz-2023-2001 SN - 2366-0325 SN - 0340-1804 VL - 52 IS - 1 SP - 67 EP - 88 PB - de Gruyter CY - Oldenburg ER - TY - CHAP A1 - Kohler, Ulrich ED - Diaz-Bone, Rainer ED - Weischer, Christoph T1 - Variance Inflation Factor T2 - Methoden-Lexikon für die Sozialwissenschaften Y1 - 2014 SN - 978-3-531-16629-2 SN - 978-3-531-18889-8 U6 - https://doi.org/10.1007/978-3-531-18889-8_22 SP - 423 EP - 423 PB - Springer CY - Wiesbaden ER - TY - JOUR A1 - Post, Julia C. A1 - Class, Fabian A1 - Kohler, Ulrich T1 - Unit nonresponse biases in estimates of SARS-CoV-2 prevalence JF - Survey research methods N2 - Since COVID-19 became a pandemic, many studies are being conducted to get a better understanding of the disease itself and its spread. One crucial indicator is the prevalence of SARS-CoV-2 infections. Since this measure is an important foundation for political decisions, its estimate must be reliable and unbiased. This paper presents reasons for biases in prevalence estimates due to unit nonresponse in typical studies. Since it is difficult to avoid bias in situations with mostly unknown nonresponse mechanisms, we propose the maximum amount of bias as one measure to assess the uncertainty due to nonresponse. An interactive web application is presented that calculates the limits of such a conservative unit nonresponse confidence interval (CUNCI). KW - COVID-19 KW - prevalence KW - probability samples KW - unit nonresponse KW - conservative confidence limits KW - nonresponse bias Y1 - 2020 U6 - https://doi.org/10.18148/srm/2020.v14i2.7755 SN - 1864-3361 VL - 14 IS - 2 SP - 115 EP - 121 PB - European Survey Research Association CY - Duisburg ER - TY - CHAP A1 - Kohler, Ulrich ED - Diaz-Bone, Rainer ED - Weischer, Christoph T1 - Toleranz T2 - Methoden-Lexikon für die Sozialwissenschaften Y1 - 2014 SN - 978-3-531-16629-2 SN - 978-3-531-18889-8 U6 - https://doi.org/10.1007/978-3-531-18889-8_20 SP - 410 EP - 410 PB - Springer CY - Wiesbaden ER - TY - GEN A1 - Albrecht, Sophia A1 - Class, Fabian A1 - Feuerstein, Collin A1 - Kohler, Ulrich A1 - Krawietz, Marian T1 - The Potsdam grievance statistics file (PGSF) BT - Codebuch und Methodenbericht N2 - Der Potsdam Grievance Statistics File (PGSF) ist eine historische Datensammlung von Beschwerden, sog. Eingaben, die in der DDR von deren Bürgern eingereicht wurden. Die Eingaben wurden schriftlich oder mündlich gestellt und waren an staatliche Institutionen gerichtet. Der Staat zählte diese Eingaben und kategorisierte sie in Eingabenstatistiken. Der PGSF enthält Eingabenstatistiken des Zeitraums 1970–1989 einer Wahrscheinlichkeitsstichprobe von im Jahr 1990 existierenden Kreisen. Zusätzlich finden sich Eingabenstatistiken eines Convenience-Samples von Kreisen aus dem Zeitraum 1970–1989. Y1 - 2020 U6 - https://doi.org/10.4232/1.13615 ER - TY - GEN A1 - Class, Fabian A1 - Kohler, Ulrich A1 - Krawietz, Marian T1 - The Potsdam Grievance Statistics File BT - new data on quality of life and political participation for the German Democratic Republic 1970–1989 T2 - Historical Methods: A Journal of Quantitative and Interdisciplinary History N2 - The newly collected “Potsdam Grievance Statistics File” (PGSF) holds data on the number and topics of grievances (“Eingaben”) that were addressed to local authorities of the German Democratic Republic (GDR) in the years 1970 to 1989. The PGSF allows quantitative analyses on topics such as participation, quality of life, and value change in the German Democratic Republic. This paper introduces the concepts of the data set and discusses the validity of its contents. T3 - Zweitveröffentlichungen der Universität Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe - 97 KW - Potsdam Grievance Statistics File (PGSF) KW - German Democratic Republic (GDR) KW - Eingaben KW - Participation KW - Quality of Life Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-412843 ER - TY - JOUR A1 - Class, Fabian A1 - Köhler, Ulrich A1 - Krawietz, Marian T1 - The Potsdam Grievance Statistics File BT - New data on quality of life and political participation for the German Democratic Republic 1970-1989 JF - Historical Methods N2 - The newly collected Potsdam Grievance Statistics File (PGSF) holds data on the number and topics of grievances (Eingaben) that were addressed to local authorities of the German Democratic Republic (GDR) in the years 1970 to 1989. The PGSF allows quantitative analyses on topics such as participation, quality of life, and value change in the German Democratic Republic. This paper introduces the concepts of the data set and discusses the validity of its contents. KW - Potsdam Grievance Statistics File (PGSF) KW - German Democratic Republic (GDR) KW - Eingaben KW - Participation KW - Quality of Life Y1 - 2018 U6 - https://doi.org/10.1080/01615440.2018.1429970 SN - 0161-5440 SN - 1940-1906 VL - 51 IS - 2 SP - 92 EP - 114 PB - Routledge, Taylor & Francis Group CY - Abingdon ER - TY - GEN A1 - Krawietz, Marian A1 - Kohler, Ulrich A1 - Class, Fabian A1 - Albrecht, Sophia A1 - Feuerstein, Collin T1 - The potsdam grievance statistic File (PGSF) BT - Eingabestatistiken der DDR zwischen 1970 und 1989 N2 - Der Potsdam Grievance Statistics File (PGSF) ist eine historische Datensammlung von Beschwerden, sog. Eingaben, die in der DDR von deren Bürgern eingereicht wurden. Die Eingaben wurden schriftlich oder mündlich gestellt und waren an staatliche Institutionen gerichtet. Der Staat zählte diese Eingaben und kategorisierte sie in Eingabenstatistiken. Der PGSF enthält Eingabenstatistiken des Zeitraums 1970–1989 einer Wahrscheinlichkeitsstichprobe von im Jahr 1990 existierenden Kreisen. Zusätzlich finden sich Eingabenstatistiken eines Convenience-Samples von Kreisen aus dem Zeitraum 1970–1989. Y1 - 2020 U6 - https://doi.org/10.4232/1.12993 ER - TY - JOUR A1 - Kohler, Ulrich A1 - Brady, David A1 - Guerra, Christian A1 - Link, Bruce T1 - The long term relationship between medicaid expansion and adult life-threatening chronic conditions JF - Social policy and administration N2 - We test whether the expansions of children's Medicaid eligibility in the 1980s–1990s resulted in long-term health benefits in terms of severe chronic conditions. Still relatively rare in the field, we use prospective individual-level panel data from the Panel Study of Income Dynamics (PSID) along with the higher quality income measures from the Cross-National Equivalent File (adjusting for taxes, transfers and household size). We observe severe chronic conditions (high blood pressure/heart disease, cancer, diabetes, or lung disease) at ages 30–56 (average age 43.1) for 4670 respondents who were also prospectively observed during childhood (i.e., at ages 0–17). Our analysis exploits within-region temporal variation in childhood Medicaid eligibility and adjusts for state- and individual-level controls. We uniquely concentrate attention on adjusting for childhood income. A standard deviation greater childhood Medicaid eligibility significantly reduces the probability of severe chronic conditions in adulthood by 0.05 to 0.12 (16%–37.5% reduction from mean 0.32). Across the range of observed childhood Medicaid eligibility, the probability is approximately cut in half. Greater childhood Medicaid eligibility also substantially reduces childhood income disparities in severe chronic conditions. At higher levels of childhood Medicaid eligibility, we find no significant childhood income disparities in adult severe chronic conditions. Y1 - 2023 U6 - https://doi.org/10.1111/spol.12942 SN - 0037-7643 SN - 1467-9515 VL - 58 IS - 1 SP - 39 EP - 60 PB - Wiley-Blackwell CY - Oxford ER - TY - JOUR A1 - Kohler, Ulrich A1 - Brady, David A1 - Guerra, Christian A1 - Link, Bruce T1 - The long term relationship between childhood Medicaid expansions and severe chronic conditions in adulthood JF - Social Policy and Administration Y1 - 2023 SN - 1467-9515 VL - 58 IS - 1 SP - 39 EP - 60 ER -