Just about every job seeker can tell this story: They apply for the perfect job opening. And then they wait. And wait. They never hear from the company. An organization may want to hire, and may post open positions, but that doesn’t mean it’s in a rush to fill them. Job seekers should note a new study by three economists which underscores that the flip side: companies frequently hire even without having a formal opening. The take-away for job-seekers: companies often move fast to fill positions as they open. If there’s a place you want to work, find a way to introduce yourself before a job opening is even posted. Because once companies decide to hire, you might not have much time to sell yourself. Read more.