When a company takes itself public, it can function like a shock to the internal system, especially at companies accustomed to operating in start-up mode. Money rushes in, some longtime employees cash out, and new pressures loom over management to increase revenue.
So Twitter, the latest high-profile I.P.O., will probably face some significant changes.
Many technology firms pledge to maintain a kind of nimble, hacker ethos after they go public. But Shai Bernstein, a professor at Stanfordâs Graduate School of Business, has conducted research that shows that rarely happens â" and his work suggests that companies move in the opposite direction.
After a company goes public, he said, âI find there is a substantial decline in the quality of innovation.â
His 2012 study, âDoes Going Public Affect Innovation?â measured the number of patents and their influence before and after their I.P.O.âs. (It had a control group of companies who planned to go public, but did not.) In an interview, Mr. Bernstein identified five theories on why his research uncovered these findings.
1. Inventive People Cash Out
For many early start-up employees, who are vital to the companyâs success, an I.P.O. can be the payday theyâve been waiting for.
âThose that are responsible for the more fundamental or core innovations before the I.P.O.? These are the guys who are more likely to leave,â he said.
Whether they are going to invest in a sailboat or another start-up, the most valuable innovators who have been waiting around for a payday often see a public offering as the moment to move on.
2. Inventive People Keep Inventing, Elsewhere
Talented tech employees might leave after an I.P.O. because of the companyâs culture, too. A newly public companyâs focus on revenue (or ads in the case of Twitter or Facebook) can change projects, assignments and priorities. If creative minds who want to âchange the worldâ are not thrilled at the prospect of engineering incremental improvements, they may be headed out the door, he said.
âImagine that you have a brilliant idea,â said Mr. Bernstein. âItâs more attractive to explore that in a private setting where you are the owner, than in a public firm, where whatever ownership you had is now heavily diluted.â
âThey do seem to remain entrepreneurial,â he said â" just not at the company their innovations helped build.
3. Management Clamps Down on Risky, Creative Work
Twitter started as a side project created by developers working on a failed audio start-up, Odeo. But with new pressure to deliver on quarterly results, managers at the company may be less willing to back the kinds of hobbyist passion projects that were the very genesis of the company they are managing today.
Mr. Bernstein said that the need to show growth every quarter, in both users and revenue, may shift Twitterâs focus away from risk-taking.
âI see substantial decline in the quality of the work after the I.P.O.,â Mr. Bernstein said, with fewer influential patents and ideas.
4. Why Build Innovation When You Can Buy It?
Newly flush with capital, many companies who recently took the I.P.O. route find that instead of relying on their original innovators, buying new technologies is more effective than building them. After an I.P.O., said Mr. Bernstein, there is a significant increase in the likelihood to acquire companies.
For Twitter, which bought 10 companies in 2012, the shopping spree is likely to continue. According to Mr. Bernsteinâs research, one can expect the social media network to keep buying other start-ups whose technology is superior to what it can produce in-house.
5. New Hires Arrive, with Different Priorities
More access to capital often means that newly public companies can go on a hiring binge, and many do.
âThere is substantial employee turnaround,â Mr. Bernstein said of the newly public companies he studied.
But if Twitter begins bringing on a fleet of new engineering talent, they no longer have the same incentives â" namely stock options for a future I.P.O. â" to attract star developers as they did before. New hires will arrive, but will be less a part of âbuilding something big,â and increasingly part of growing and maintaining someone elseâs ideas.
A Caveat
As Twitter goes through this transition â" seeing old talent leave, new talent arrive, new companies acquired and a new set of priorities driving the company â" Mr. Bernstein cautions that while Twitter may become a less innovative company, that does not mean it will become a less valuable one. The changes that a company undergoes after a public offer may be the most efficient way for them to create more value.
Public offerings are not a bad thing, he said. They are essential to the entrepreneurial ecosystem that birthed companies like Twitter.
âIf we take out the I.P.O. market,â he said, âwhy would venture capitalists invest in the first place?â