Employee non-compete agreements have stifled tech startup development according to research from Havard University.

The research found that in areas such as Massachusetts, where the pacts are aggressively enforced, the IT industry suffers but failed to hold back the IT industry boom in states like California, where they are mostly unenforceable.

Non-compete agreements, which generally seek to prohibit workers who leave a company from taking a job with a competitor for a fixed period of time, don't necessarily affect new graduates entering their first job, according to a panel consisting of venture capitalists, a Google executive and academics.

But the agreements can stifle innovation because they particularly hurt experienced, specialised workers -- the type of individuals who are often recruited to help guide a startup, panelists said.

Some instead seek employment in large companies that can defend them against litigation related to non-compete agreements, said Lee Fleming, an associate professor at Harvard who is conducting a research project into the subject.

"They tend to avoid startups, which don't have the resources to protect them," he said. Others leave their field entirely, according to Fleming.

However, Fleming repeatedly cautioned that empirical data regarding the effect of non-compete agreements is scant.

That didn't stop Paul Maeder, a general partner in the venture firm Highland Capital Partners, from calling them "destructive."

He laid out a hypothetical scenario that banked on the premise a successful company will, over time, spawn five successful startup companies.

Maeder posited that individuals from those organisations in turn will form their own enterprises, creating a geometric progression resulting in hundreds of companies - even accounting for the fact that many startups will fail - after just a handful of "generations."

"Now what happens if we have non-competes that discourage startups before they even get started? They're the silent killer," he argued.

Other problems surround the way non-compete agreements are created and enforced, said investor Bijan Sabet, general partner at Spark Capital.

"The experience we've seen is that the employer keeps [the definition of a competing company] really vague, and it causes confusion," Sabet said. The terms of non-compete agreements are often confused or conflated with other types of restrictive contracts workers sign, such as non-disclosure agreements, he added.

While non-compete agreements ostensibly protect a company's interests, legislation is in place to handle "anything tangible that a company would own," said Rich Miner, vice president for mobile technology at Google. "All of that stuff is either patented, copyrighted or somehow protected."

"They don't have the non-compete agreements, and West Coast high-tech companies seem to be doing just fine," he added.

Maeder noted how different the tech climate can be, however, in certain West Coast states that see more enforcement of non-compete pacts.

"I haven't seen any competing operating system companies that came out of Washington," he said, alluding to Microsoft, "or any other online booksellers that are competing with Amazon."

Massachusetts, meanwhile, has a wealth of intellectual and financial capital, but its growth is hindered by non-competes, Maeder argued.

"It also affects [existing] companies. They get lazy. We really have to think about how sleepy Massachusetts companies have become," he said.

If there is to be any shift in the way non-competes are handled in Massachusetts, it probably won't come through legislation, Maeder predicted.

"If [any politician] raises their hand on this issue, they will be group-tackled by the CEOs of long-time companies in Massachusetts, and it will quickly die," he said. "Talking to the government is good, but it's not the agent of change here."

Workers need to become savvier, and venture fund officials should convince companies they invest in to stop demanding non-compete agreements, Maeder said, adding that he's going to do more in this regard himself.

One attendee suggested it will be tough to effect change in the state.

"The incumbent companies are vested [in the concept]. It's a cheap way of preventing people from walking out and it's a cheap way of keeping the cost of engineers down," said Stephen Chow, a Boston attorney.