This thesis examines the determinants of superannuation members' investment choices across fund families, with a focus on the effect of information costs. Existing literature on managed funds may not be easily generalised to the superannuation fund setting given the distinct attributes and behaviour of superannuation investors. In contrast to prior research, this thesis uses an actual decision-making measure, namely, member-nominated transfers, to examine investors who have 'made a choice' at the fund family level. While members' information costs are not directly observable or measurable, this thesis identifies two attributes that can reduce members' information search and processing costs, namely, superannuation fund families' visibility and transparency. Results indicate that, on average, industry superannuation fund families provide better PDS disclosure than their retail counterparts, in terms of both readability and the extent of disclosure.In addition, the causes and consequences of superannuation fund families' PDSs are studied inChapter 5 and Chapter 6. There is no significant relation between superannuation fund families'performance and the quality of PDS disclosure. Increased investment inflows encourage superannuation families to provide more information in an easier-to-understand manner in the PDS, especially the industry families. And better quality/content of PDS disclosure can attract inflows, especially for the retail families.