“…Access is also regulated by conditions which Hägerstrand has called "authority constraints" or "those general rules, laws, economic barriers, and power relationships that determine who does or does not have access to specific domains at specific times" (Pred, 1977 p.208). These conditions may include, for instance, price and rights mechanisms (Bernard et al, 2007, Golledge andStimson, 1997), as well as norms (Baldassare, 1978, Jiron, 2007, Skelton, 2013, Reynolds, 2013. As an outcome of price mechanisms, for example, high quality resources such as healthy foods, which are usually priced higher than unhealthy foods, are less accessible to low income groups.…”