Understanding how car travel and ownership respond to income and fuel prices, and how that response varies between households is crucial for car use policies and forecasts. This thesis, consisting of two papers, aims to investigate this by estimating the intemporal income and fuel price elasticities of car use using micro registry panel data on all Swedish households from 1998 to 2018. In Paper I, the income and fuel price elasticities of vehicle kilometres travelled (VKT) is estimated for all Swedish households using a linear fixed effects model. In order to investigate how different groups respond, the elasticities are estimated by income group and municipality type. The effect of income and fuel prices on VKT is largest in the middle of the income distribution but is relatively stable across municipality types. The effect of fuel prices on VKT is largest in densely populated municipalities compared to rural municipalities. Moreover, it is shown that the income elasticity is underestimated if income variable is misspecified. Paper II utilises a discrete-continuous model accounting for the effect of income and fuel prices on car ownership. It is shown that income impacts car ownership and VKT conditional on car ownership of similar magnitude, while fuel prices primarily impact VKT conditional on car ownership. Furthermore, we also estimate the model on six partially overlapping sample periods and find that the income elasticity has decreased over time, while the absolute fuel price elasticity increased up until the early 2010s and decreased thereafter. / <p>2022-10-13: ISBN (PDF) has been added in the E-version.</p>

Understanding how car travel and ownership respond to income and fuel prices, and how that response varies between households is crucial for car use policies and forecasts. This thesis, consisting of two papers, aims to investigate this by estimating the intemporal income and fuel price elasticities of car use using micro registry panel data on all Swedish households from 1998 to 2018. In Paper I, the income and fuel price elasticities of vehicle kilometres travelled (VKT) is estimated for all Swedish households using a linear fixed effects model. In order to investigate how different groups respond, the elasticities are estimated by income group and municipality type. The effect of income and fuel prices on VKT is largest in the middle of the income distribution but is relatively stable across municipality types. The effect of fuel prices on VKT is largest in densely populated municipalities compared to rural municipalities. Moreover, it is shown that the income elasticity is underestimated if income variable is misspecified. Paper II utilises a discrete-continuous model accounting for the effect of income and fuel prices on car ownership. It is shown that income impacts car ownership and VKT conditional on car ownership of similar magnitude, while fuel prices primarily impact VKT conditional on car ownership. Furthermore, we also estimate the model on six partially overlapping sample periods and find that the income elasticity has decreased over time, while the absolute fuel price elasticity increased up until the early 2010s and decreased thereafter.

Sammanfattning Bakgrund: Förutsättningarna för god och säker vård är att basala hygienrutinerna följs inom vården. Genom tillämpning av god handhygien motverkas smittspridning och vårdrelaterade infektioner. Vårdskador kan medföra att vårdtiden ökar och orsaka lidande för patienten och är därför ett hot mot säker vård. Syfte: Syftet var att undersöka vårdpersonalens följsamhet till basala hygienrutiner, på en medicinsk akutvårdsavdelning med fokus på handhygien. Metod: En kvantitativ registerstudie med långtidsuppföljning har utförts. Datamaterialet var hämtat från registret för Mätning och Analys (MOA). Observationerna insamlades av hygienobservatörer på en medicinsk akutvårdsavdelning i södra Sverige år 2013 – 2018. Data importerades över till statistikprogrammet SPSS. Deskriptiv och analytisk statistik har använts för analys.  Resultat: Vid analys framkom (n=491) det att följsamheten till handhygienen har brister, undersköterskor visar på högst följsamhet. Handsprit efter patientkontakt var det momentet som visade högst följsamhet. Det finns brister i handhygienen över tid då följsamheten inte var hundraprocentig under samtliga år. Slutsats: Följsamheten till handhygienen påverkas av många faktorer. God och säker vård är beroende av att vårdpersonal har kunskap om handhygien och smittspridning. För att vårdpersonal ska förbättra det preventiva arbetet mot säkrare vård är det vårdgivaren som ska medverka till ny kunskap. Medarbetare har ansvaret för att upprätthålla och följa den kunskapen. / Summary Backgorund: The preconditions for good and safe care is that the basic hygiene routines are followed within the care. The application of good hand hygiene prevents the spread of infection and health-related infections. Care injuries can increase the length of care and cause suffering for the patient and are therefore a threat to safe care. Aim: To investigate the compliance of healthcare professionals to basic hygiene routines, in a medical emergency care department with a focus on hand hygiene. Method: A quantitative registry study with long-term follow-up has been performed. The data material was retrieved from the register for Measurement and Analysis (MOA). The observations were collected by hygiene observers at a medical emergency department in southern Sweden in 2013 - 2018. Data was imported into the statistical program SPSS. Descriptive and analytical statistics have been used for analysis. Results: In the analysis (n=491) it was found that the adherence to the hand hygiene has shortcomings, the assistant nurses show the highest adherence. Hand rub after patient contact was the element that showed the highest level of compliance. There are shortcomings in hand hygiene overtime as compliance was not hundred percent during all years. Conclusion: Adherence to hand hygiene is influenced by many factors. Good and safe care is dependent on the fact that healthcare professionals have knowledge of hand hygiene and the spread of infection. In order for healthcare professionals to improve preventive work towards safer care, the healthcare provider must contribute to new knowledge. Employees are responsible for maintaining and following that knowledge.

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