In November of the year 2012, Spark published an official press release which raised a big problem regarding inner-city parking facilities. According to this Dutch consultancy firm, the use of inner-city parking facilities decreased with 10% between 2008 and 2012. This is a very shocking finding because the CBS consumption index decreased only 3.7% over the same time horizon. Based on these facts, Spark advised municipalities to be careful with parking facility expansions. These parking facility expansions are very costly affairs and when the usage decreases, these investments are a total waste. This panel research of Spark is very interesting and useful for municipalities, but the press release doesn’t provide an explanation for this sudden decrease of the parking production over five years. This thesis will research possible indicators that could explain the change in the usage of inner-city parking facilities. In cooperation with Spark, data is gathered to create a dataset. Spark provided the data about the parking production and the parking tariffs of 29 different municipalitites. Possible indicators which may influence the parking production are determined by a literature review. Data about these indicators are gathered from the central bureau of statistics database called Stateline. This database will serve as input for the quantitative research. The quantitative research produced some very interesting results. The average WOZ value, which functions as an attractiveness indicator, is positively related to the parking production. When the average WOZ value increases, the parking production per parking spot will increase as well. There is also a significant positive relationship between the relative amount of retail stores and the parking production per parking spot. Last but not least, the research showed a negative relationship between the parking tariffs and the parking production. This negative relationship suffers from diminishing marginal effect. When the parking tariffs get higher, the negative effect of a price increase gets smaller. These three significant relationships in the selected municipalities give a better insight in the problem that is raised by Spark. This research shows the importance of monitoring parking data in inner-city regions.