We model the long-term rental market (i.e. contract of 6 months or more), assuming it is perfectly competitive, with the impact that short-term rental platforms - resulting higher rental prices - might have on this market. Choose relevant options and include a graph to represent this reasoning.

Their effect is to cause [ Select ] ["an increase", "a decrease", "neither an increase nor a decrease"] in rental prices and [ Select ] ["an increase", "a decrease", "neither an increase nor a decrease"] in rental accommodation.