From an article in the Wall Street Journal:
All too often during matches, seemingly fit men fall to the ground in agony. They scream, wince, pound the grass with their fists and gesture to the sidelines for a stretcher. Some of them clutch a limb as if it was just freed from the jaws of a wood chipper. But after a few moments, just as the priests arrive to administer last rites, they sit up on the gurney, shake it off, rise to their feet and run back on the field to play some more.Details at the link, via Reddit.
Fans of the world's most popular game know that this is just one of soccer's oldest and most universally despised tactics. Turning a small foul into a death performance worthy of La Scala can draw cards for opposing players, kill time from the clock or just give one's winded teammates a breather...
The study showed one thing emphatically: The amount of histrionics your players display during a match correlates strongly to what the scoreboard says. Players on teams that were losing their games accounted for 40 "injuries" and nearly 12.5 minutes of writhing time. But players on teams that were winning—the ones who have the most incentive to run out the clock—accounted for 103 "injuries" and almost four times as much writhing.