"Of all the series mentioned above, “Harry Potter” is most pertinent to Boyhood. Their production periods overlapped considerably, and their directors faced similar major challenges. This despite the disparity in their finances. “Harry Potter” had a huge budget supplied by Warner Bros., ranging from the lowest at $100 million for Chamber of Secrets to the highest at $250 million for Half-Blood Prince. (These are the budgets as publicly acknowledged, taken from Box-Office Mojo, which has no figures for the last two films.) Boyhood had a lean budget of $200 thousand for each of the twelve years and totaling about $4 million with postproduction and other expenses added in. Still, as we shall see, the challenges really had nothing to do with the budgets."Previously. I love the nugget that the the IFC Center in New York ran all eight Potter films in a row as a homage to Boyhood. Kristin makes a convincing case for the two to be somehow inextricably linked, and the appearance of the Potter books in Boyhood suggests it is something Linklater was clearly conscious of.
Film Kristin Thompson's written a rather brilliant (and detailed!) comparative study of Boyhood and the Harry Potter film series: