Campaign spending and voter turnout does a candidate’s local prominence influence the effect of their spending?

At election time, political candidates in Britain routinely spend significant sums of money on their local campaigns. Generally speaking, the more individual candidates spend, the higher turnout in that constituency. But while some candidates are major contenders in their area, many candidates who are unlikely to win also spend substantial sums on their campaigns. By analysing candidate spending data from the 2010 general election, Siim Trumm, Laura Sudulich and Joshua Townsley find that the money spent by viable contenders has a greater impact on voter turnout than spending by candidates who are unlikely to win.