Many large property owners use rent-pricing software to figure out what to charge their tenants. And that practice has come under scrutiny after an investigation last fall from ProPublica into the software company RealPage and its rental pricing algorithm. Several lawsuits have accused RealPage of colluding with landlords to artificially inflate rents and limit the supply of housing. The Department of Justice is also investigating. Marketplace’s Amy Scott spoke with Heather Vogell, a reporter at ProPublica who has been following the developments since her initial investigation on RealPage’s algorithm came out.