<p>Because of the socioeconomic and ethnic segregation in many Swedish towns, residents with different social backgrounds are often living in separate neighbourhoods. This thesis focuses on children aged between 11 and 14 and explores the spatial extent of their social networks, their spatial mobility and spatial representations. By studying these aspects of children’s daily lives the study attempts to contribute to a better understanding of the underlying mechanisms behind neighbourhood effects.</p><p>The spatial extension of the daily lives of children in seven adjacent neighbourhoods in a medium sized Swedish town is mapped. By using children’s activity diaries, surveys with parents and children’s maps the study explores to which extent children with different personal characteristics and from different neighbourhoods have friends outside their own neighbourhoods, where they spend time and what kind of activities they engage in and with whom. The study shows that the possibility to get their own direct experience of other neighbourhoods differs between groups of children, much depending on the geographical extension of their social networks, which in turn appears mainly to be a consequence of school reception areas and, indirectly, school popularity.</p><p>By using children’s maps and group interviews children’s perspectives of their own and other neighbourhoods are analysed. The thesis illustrates how children feel about and discuss their own neighbourhoods and other neighbourhoods in town. The children in the study emphasize their own neighbourhood as a good and quiet neighbourhood, irrespective of the neighbourhood’s character and status. One of the neighbourhoods is stigmatised in the public discourse. Among the children there is a living debate in relation to this neighbourhood. In group interviews the children sometimes confirm, sometimes critically question the rumours about this neighbourhood. The children which live in this neighbourhood are aware of the bad reputation and also act and react upon it</p>

Because of the socioeconomic and ethnic segregation in many Swedish towns, residents with different social backgrounds are often living in separate neighbourhoods. This thesis focuses on children aged between 11 and 14 and explores the spatial extent of their social networks, their spatial mobility and spatial representations. By studying these aspects of children’s daily lives the study attempts to contribute to a better understanding of the underlying mechanisms behind neighbourhood effects. The spatial extension of the daily lives of children in seven adjacent neighbourhoods in a medium sized Swedish town is mapped. By using children’s activity diaries, surveys with parents and children’s maps the study explores to which extent children with different personal characteristics and from different neighbourhoods have friends outside their own neighbourhoods, where they spend time and what kind of activities they engage in and with whom. The study shows that the possibility to get their own direct experience of other neighbourhoods differs between groups of children, much depending on the geographical extension of their social networks, which in turn appears mainly to be a consequence of school reception areas and, indirectly, school popularity. By using children’s maps and group interviews children’s perspectives of their own and other neighbourhoods are analysed. The thesis illustrates how children feel about and discuss their own neighbourhoods and other neighbourhoods in town. The children in the study emphasize their own neighbourhood as a good and quiet neighbourhood, irrespective of the neighbourhood’s character and status. One of the neighbourhoods is stigmatised in the public discourse. Among the children there is a living debate in relation to this neighbourhood. In group interviews the children sometimes confirm, sometimes critically question the rumours about this neighbourhood. The children which live in this neighbourhood are aware of the bad reputation and also act and react upon it

The Swedish education system has undergone decentralisation and deregulation since the late 1970s. The 1999 parliamentary resolution for a 5-year experiment of increased school autonomy in time allocation, was a late step in this development. Approximately 900 compulsory schools in 79 municipalities no longer had to adhere to the regulation of the national time schedule. The overall aim of this thesis is to describe and analyse changes of time allocation and time use in schools during the experiment. The analysis has the theories and research by Basil Bernstein and Michael Fullan as the point of departure. Framing and classification, educational change and teachers’ work culture are some of the key concepts. The results from interviews with 32 local directors formed the basis of selection of three participating municipalities and schools in the longitudinal study. The sample included both municipalities participating and some not participating in the experiment. The schools had varying motives for participating, and different initial time allocation strategies and procedures. However, they all shared an ambition to strengthen curriculum and school development. Pupils, teachers and head teachers from three classes and teacher teams in the three schools were interviewed and observed over a period of two years. Documents on time use and policies from the three schools were analysed. No dramatic changes were observed. Changes rarely meant a redistribution of time between contents/subjects or pupils. Instead they were predominantly about weakened boundaries between subjects and teachers, increased teacher control over the work and giving pupils more influence over their own learning situation. So called open lessons, when pupils were allowed to choose what, where and how to study, cross-disciplinary studies and subject-integrated teamwork facilitated this. A majority of pupils and teachers appreciated the increased freedom and control over their work. Some teachers, however, tended to be more hesitant, pointing to risks of work overload and lowered academic achievement. Both teachers and pupils doubted that all pupils could manage highly autonomous studies, and agreed that some needed more structure and help from the teachers. Teachers in practical and aesthetic subjects were often constrained from engaging in cross-disciplinary studies and teamwork. Having one’s teaching assignment divided between many different classes and even schools, and lack of premises were commonly mentioned obstacles. Committed head teachers and well-functioning teacher teams were significant factors were commonly in the observed development process. Also, active support from the municipality and network-participation were contributing factors. Attention is drawn to the fact that it is not possible to relate the observed changes exclusively to the time schedule experiment. They were feasible within the existing, flexible frames of the national time schedule. Furthermore, a number of other changes occurred parallel to the experiment.

Economists have rejected the popular view that time use is primarily influenced by local customs and law, and instead argue that it is determined by optimal choices of economic agents and the market mechanism. However the analysis of time allocation has been focused on the labor-leisure choice problem which posits a worker who wants more leisure because of his preference for leisure over work. Thus going beyond the standard model, these essays add to the theory of the economics of time use. First I examine why married men earn more. I explore the possibility that differences in household work by marital status can explain the observed male marital wages advantage. Depending on the type and timing of household work, I segregate it into flexible and inflexible household work, using the American Time Use Survey. Empirical results provide strong support for the productivity difference between married and never married men. Household work has significant negative and differential effects on wages. The effects are not only driven by total time spent on household work, but also by types and timing of household work. The result shows that inflexible household work has a stronger negative effect on wages than flexible household work. Second I study how taxes affect time and goods allocation in home production. I claim that an increase in sales taxes encourages households to substitute away from the market goods input in favor of untaxed non-market time input. I explore the substitution response by relating household market purchases and time use. The theory part shows that the size of elasticity of substitution between market goods input and time input is crucial for understanding the government's optimal tax policy. Then I show that it is optimal to impose lower taxes on goods used in the production of commodities with a higher elasticity of substitution. In the empirical part, I estimate sizes of elasticities of substitution of goods for time with the combined survey of Mexican household consumption expenditures and time allocation for 2002. I find that the elasticity of substitution for 'Eating' is lowest. Finally wage compensation for climate is examined. Using the Merged Outgoing Rotation Group File from 2002 to 2007, I find that the North-South wage differential in construction and extraction occupations is much higher than in any other occupations. I claim that this is because weather affects wage determination. If individuals are to locate in both desirable and undesirable locations, undesirable locations must offer higher wages. Using the O*NET database, I obtain information on how often an occupation requires exposure to weather conditions. Estimation results of the wage equation show that wage compensation for living in bad weather amounts to 11.9 percent of hourly wages evaluated at sample means. The difference in wage compensation for working in bad weather between the most exposed (outdoorness index = 5) and least exposed (outdoorness index = 0) occupations is estimated to be 9.6 percent of hourly wages evaluated at sample means. In addition, I find that the occupational injury risk is related to weather conditions in the case of construction and extraction occupations. / text

This thesis examines the time-use patterns of adults in dual-earner households with and without children as a function of several individual and household socio-demographics and employment characteristics. A disaggregate activity purpose classification including both in-home and out-of-home activity pursuits is used because of the travel demand relevance of out-of-home pursuits, as well as to examine both mobility-related and general time-use related social exclusion and time poverty issues. The study uses the Nested Multiple Discrete Continuous Extreme Value (MDCNEV) model, which recognizes that time-decisions entail the choice of participating in one or more activity purposes along with the amount of time to invest in each chosen activity purpose, and allows generic correlation structures to account for common unobserved factors that might impact the choice of multiple alternatives. The 2010 American Time Use Survey (ATUS) data is used for the empirical analysis. A major finding of the study is that the presence of a child in dual-earner households not only leads to a reduction in in-home activity participation but also a substantially larger decrease in out-of-home activity participation, suggesting a higher level of mobility-related social exclusion relative to overall time-use social exclusion. To summarize, the results in the thesis underscore the importance of re-designing work policies in the United States to facilitate a reduction in work-family conflict in dual-earner families. / text

Energy use is a part of everyday life and the use of energy is a part of the global climate change. Policy makers urge individuals to change their daily behaviour in order to mitigate climate change and care for our common environment. The dissertation regards daily behaviour as activities performed by individuals. The theoretical base is the time-geographic approach wherein everyday life is regarded as a sequence of interlinked activities performed by indivisible individuals. The dissertation investigates individuals’ energy use as an outcome of the activities they perform in everyday life. The empirical base of the dissertation is time-diaries from the Swedish time use survey 2010/2011. The diary data is explored as sequences of daily activities by using sequence analysis and clustering. The results show that individuals’ energy use is closely interweaved with how they live their everyday lives in terms of activity sequences. The results imply that changing an activity affects both the intricate web of interaction in the household and the interdependence of activities in everyday life. Change does not only affect the singular activity that was the object for the change, but rather major parts of the sequence of activities. In order to address energy conservation in information campaigns considerations ought to be taken on how everyday life is shaped and formed by the individual, by negotiations between the individuals in households, and societal structures. Information can be targeted to groups of individuals  with similar activity sequences as they are revealed by cluster analysis. / Energianvändningen är en del av vardagen likaväl som användningen av energi är en del av den globala klimatförändringen. För att mildra effekterna på vår gemensamma miljö uppmanas människor av politiker och andra beslutsfattare att förändra sitt vardagsbeteende. I avhandlingen betraktas vardagsbeteendet som människors dagliga aktiviteter. Avhandlingens teoretiska grund är den tidsgeografiska ansatsen, där människors vardag betraktas som en sekvens av de aktiviteter som utförs av odelbara individer. Människors dagliga sekvens av aktiviteter undersöks för att ta reda på vilken energianvändning som genomförandet av aktiviteterna ger upphov till. Den empiriska grunden för avhandlingen är tidsdagboksdata från den svenska tidsanvändningsstudien från 2010/2011 och avhandlingen utforskar tidsdagböckerna som sekvenser av aktiviteter med hjälp av sekvens- och klusteranalys. Resultaten visar att individers energianvändning är nära sammanvävd med de aktivitetssekvenser som visar hur vardagslivet levs. Resultaten pekar vidare på att förändringar av enskilda aktiviteter också påverkar andra aktiviteter i det dagliga livet. Förändringar av en aktivitet påverkar således hela den dagliga sekvensen av aktiviteter. I utformningen av information som syftar till att minska hushållens energianvändning bör hänsyn tas till hur vardagslivets aktivitetssekvens formas av den enskilde i samspelet både med andra individer i hushållet och med samhällsstrukturerna. Målgruppsinriktad information kan utformas med utgångspunkt from människors likartade aktivitetsmönster så som de framgår genom klusteranalys.

Grid-connected photovoltaic (PV) capacity is increasing worldwide, mainly due to extensive subsidy schemes for renewable electricity generation. A majority of newly installed systems are distributed small-scale systems located in distribution grids, often at residential customers. Recent developments suggest that such distributed PV generation (PV-DG) could gain more interest in Sweden in the near future. With prospects of decreasing system prices, an extensive integration does not seem impossible. In this PhD thesis the opportunities for utilisation of on-site PV generation and the consequences of a widespread introduction are studied. The specific aims are to improve modelling of residential electricity demand to provide a basis for simulations, to study load matching and grid interaction of on-site PV and to add to the understanding of power system impacts. Time-use data (TUD) provided a realistic basis for residential load modelling. Both a deterministic and a stochastic approach for generating different types of end-use profiles were developed. The models are capable of realistically reproducing important electric load properties such as diurnal and seasonal variations, short time-scale fluctuations and random load coincidence. The load matching capability of residential on-site PV was found to be low by default but possible to improve to some extent by different measures. Net metering reduces the economic effects of the mismatch and has a decisive impact on the production value and on the system sizes that are reasonable to install for a small-scale producer. Impacts of large-scale PV-DG on low-voltage (LV) grids and on the national power system were studied. Power flow studies showed that voltage rise in LV grids is not a limiting factor for integration of PV-DG. Variability and correlations with large-scale wind power were determined using a scenario for large-scale building-mounted PV. Profound impacts on the power system were found only for the most extreme scenarios. / Felaktigt tryckt som Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 711

Recent developments in mobile information and communication technologies (ICT), vehicle automation, and the associated debates on the implications for the operation of transport systems and for the appraisal of investment has heightened the importance of understanding how people spend travel time and how productive they are while travelling. To date, however, no approach has been proposed that incorporates the joint modelling of in-travel activity type, activity duration and productivity behaviour. To address this critical gap, we draw on a recently developed PPS framework (Pawlak et al., 2015) to develop a new joint model of activity type choice, duration and productivity. In our framework, we use copulas to provide a flexible link between a discrete choice model of activity type choice, a hazard-based model for activity duration, and a log-linear model of productivity. Our model is readily amenable to estimation, which we demonstrate using data from the 2008 UK Study of Productive Use of Rail Travel-time. We hence show how journey-, respondent-, attitude-, and ICT-related factors are related to expected in-travel time allocation to work and non-work activities, and the associated productivity. To the best of our knowledge, this is the first framework that both captures the effects of different factors on activity choice, duration and productivity, and models links between these aspects of behaviour. Furthermore, the convenient interpretation of the parameters in the form of semi-elasticities enables the comparison of effects associated with the presence of on-board facilities (e.g., workspace, connectivity) or equipment use, facilitating use of the model outputs in applied contexts.

Currently, there is a legislative procedure in the EU to abolish switching of time regimes. Under this procedure, member countries should choose to observe either permanent Standard Time (ST) or permanent Daylight Saving Time (DST). We study whether the time regime has an effect on how people spend their time. The data we are using are daily time use panel data of US citizens from the American Time Use Survey from 2003 to 2019. To study time use of daily activities, we combine the short-run before-after effect of time regime switch with the long-run comparison of time regimes in Difference-in-Differences. We layout basic implications for EU member states, regarding individuals' time use preferences, and the time regime reform.

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