. By Christiana -- Markets are still excited about the economy as Federal Reserve Chairman Jerome Powell assured everyone that its monetary spigot will remain wide open."There is a brighter outlook for the U.S. economy from fiscal support, vaccines, but unevenness in recovery is a serious issue," Powell said. "We want to see a string of months like the March jobs report to see progress." Case in point: Weekly jobless claims increased more than expected, sending U.S. bond yields lower and paving the way for big tech to continue its climb. Banks dropped.Feels like those summer Fridays are starting early. Not too much to look forward to tomorrow.Here are three things that could affect markets tomorrow:1. Economic dataProducer prices for March are the lone eco data point on a slow Friday. Economists are calling for a 0.5% gain when it hits at 8:30 AM ET (1230 GMT), matching the prior month's increase. Look for that number to pick up in the coming months, though.2. Union or bust We may know by tomorrow whether Amazon (NASDAQ:AMZN) warehouse workers in Bessemer, Alabama, will be the e-commerce giant's first union. The National Labor Relations Board has started tallying the ballots from last month's vote. The process is expected to take several hours, reported, but contested ballots could prolong the process.3. Tee timeIt's round two of The Masters. How does this affect markets you ask? It's tangential, but we expect more than a few traders will have one eye on the Nasdaq 100 and the other on Augusta. Also, we warned you it was slow.