Har tillgänglighet ett pris? : En empirisk studie av utbyggnaden av tunnelbanan till Hammarby Sjöstad

I syfte att bemöta befolkningstillväxten i Stockholmsområdet har flera satsningar inom kollektivtrafiken påbörjats. Denna studie har fokuserat på utbyggnaden av tunnelbanesystemet till Hammarby Sjöstad och undersökt sambandet mellan den planerade tunnelbanestationen Hammarby Kanal och bostadsrättspriser i området. Egeninsamlade data från perioden 2013 till 2017 lägger grunden för den hedoniska prissättningsmodell som skattas i syfte att pröva hur euklidiskt avstånd och gångavstånd till den planerade tunnelbanestationen samvarierar med bostadsrättspriser i området. För att undersöka huruvida den ökade tillgängligheten till kollektivtrafiken gav en kausal effekt på bostadsrättspriser i Hammarby Sjöstad analyseras en difference-in-differences-modell som jämför bostadspriserna före och efter samrådet. Resultatet har visat på en negativ samvariation mellan närhet till den planerade tunnelbanestationen och bostadsrättspriser i Hammarby Sjöstad. Däremot hade samrådet en positiv effekt på bostadspriser som kunde statistiskt säkerställas ett år efter samrådet vilket indikerar att en ökad tillgänglighet överlag är något som värderas positivt i Hammarby Sjöstad.To respond to the population growth in the Stockholm area, several public transit investments have begun. This study has been focusing on the extension of the metro to Hammarby Sjöstad and has examined the connection between the planned metro station Hammarby Kanal and housing prices in the area. Self-collected data from 2013 to 2017 lay the foundation for the hedonic pricing model which estimates how Euclidian distance and walking distance covaries with housing prices in the area. To examine whether the increased access to public transport gave a causal effect on the housing prices in Hammarby Sjöstad, a difference-in-differences model that compares the housing prices before and after the consultation is also analyzed. The result shows that there is a negative covariation between being close to the planned metro station and housing prices in Hammarby Sjöstad. However, the consultation had a positive effect on housing prices that was statistically significant one year after the consultation which indicates that an increased accessibility is something that is positively valued in Hammarby Sjöstad

Har tillgänglighet ett pris? : En empirisk studie av utbyggnaden av tunnelbanan till Hammarby Sjöstad

I syfte att bemöta befolkningstillväxten i Stockholmsområdet har flera satsningar inom kollektivtrafiken påbörjats. Denna studie har fokuserat på utbyggnaden av tunnelbanesystemet till Hammarby Sjöstad och undersökt sambandet mellan den planerade tunnelbanestationen Hammarby Kanal och bostadsrättspriser i området. Egeninsamlade data från perioden 2013 till 2017 lägger grunden för den hedoniska prissättningsmodell som skattas i syfte att pröva hur euklidiskt avstånd och gångavstånd till den planerade tunnelbanestationen samvarierar med bostadsrättspriser i området. För att undersöka huruvida den ökade tillgängligheten till kollektivtrafiken gav en kausal effekt på bostadsrättspriser i Hammarby Sjöstad analyseras en difference-in-differences-modell som jämför bostadspriserna före och efter samrådet. Resultatet har visat på en negativ samvariation mellan närhet till den planerade tunnelbanestationen och bostadsrättspriser i Hammarby Sjöstad. Däremot hade samrådet en positiv effekt på bostadspriser som kunde statistiskt säkerställas ett år efter samrådet vilket indikerar att en ökad tillgänglighet överlag är något som värderas positivt i Hammarby Sjöstad.To respond to the population growth in the Stockholm area, several public transit investments have begun. This study has been focusing on the extension of the metro to Hammarby Sjöstad and has examined the connection between the planned metro station Hammarby Kanal and housing prices in the area. Self-collected data from 2013 to 2017 lay the foundation for the hedonic pricing model which estimates how Euclidian distance and walking distance covaries with housing prices in the area. To examine whether the increased access to public transport gave a causal effect on the housing prices in Hammarby Sjöstad, a difference-in-differences model that compares the housing prices before and after the consultation is also analyzed. The result shows that there is a negative covariation between being close to the planned metro station and housing prices in Hammarby Sjöstad. However, the consultation had a positive effect on housing prices that was statistically significant one year after the consultation which indicates that an increased accessibility is something that is positively valued in Hammarby Sjöstad

Body appreciation around the world: Measurement invariance of the Body Appreciation Scale-2 (BAS-2) across 65 nations, 40 languages, gender identities, and age

The Body Appreciation Scale-2 (BAS-2) is a widely used measure of a core facet of the positive body image construct. However, extant research concerning measurement invariance of the BAS-2 across a large number of nations remains limited. Here, we utilised the Body Image in Nature (BINS) dataset - with data collected between 2020 and 2022 - to assess measurement invariance of the BAS-2 across 65 nations, 40 languages, gender identities, and age groups. Multi-group confirmatory factor analysis indicated that full scalar invariance was upheld across all nations, languages, gender identities, and age groups, suggesting that the unidimensional BAS-2 model has widespread applicability. There were large differences across nations and languages in latent body appreciation, while differences across gender identities and age groups were negligible-to-small. Additionally, greater body appreciation was significantly associated with higher life satisfaction, being single (versus being married or in a committed relationship), and greater rurality (versus urbanicity). Across a subset of nations where nation-level data were available, greater body appreciation was also significantly associated with greater cultural distance from the United States and greater relative income inequality. These findings suggest that the BAS-2 likely captures a near-universal conceptualisation of the body appreciation construct, which should facilitate further cross-cultural research

Optimization of adsorptive removal of α-toluic acid by CaO2 nanoparticles using response surface methodology

The present work addresses the optimization of process parameters for adsorptive removal of α-toluic acid by calcium peroxide (CaO2) nanoparticles using response surface methodology (RSM). CaO2 nanoparticles were synthesized by chemical precipitation method and confirmed by Transmission electron microscopy (TEM) and high-resolution TEM (HRTEM) analysis which shows the CaO2 nanoparticles size range of 5–15 nm. A series of batch adsorption experiments were performed using CaO2 nanoparticles to remove α-toluic acid from the aqueous solution. Further, an experimental based central composite design (CCD) was developed to study the interactive effect of CaO2 adsorbent dosage, initial concentration of α-toluic acid, and contact time on α-toluic acid removal efficiency (response) and optimization of the process. Analysis of variance (ANOVA) was performed to determine the significance of the individual and the interactive effects of variables on the response. The model predicted response showed a good agreement with the experimental response, and the coefficient of determination, (R2) was 0.92. Among the variables, the interactive effect of adsorbent dosage and the initial α-toluic acid concentration was found to have more influence on the response than the contact time. Numerical optimization of process by RSM showed the optimal adsorbent dosage, initial concentration of α-toluic acid, and contact time as 0.03 g, 7.06 g/L, and 34 min respectively. The predicted removal efficiency was 99.50%. The experiments performed under these conditions showed α-toluic acid removal efficiency up to 98.05%, which confirmed the adequacy of the model prediction