We tend to believe that government regulations should make it as easy as possible to start a business. However, I argue that some regulatory barriers to entry can have a positive effect on entrepreneurship. I will use Canada (where I live now) and Belgium (where I'm originated from and spent most of my life) to illustrate my opinion.

Consider the following. In Belgium, starting a limited company requires around $50,000 of initial capital. Moreover, going through the red tape can take months before being fully authorized to operate. In contrast, in Canada, anyone can incorporate a business with 200 dollars and a couple of weeks.
While the latter situation looks best, it also raises issues. Indeed, the net result is that in Canada essentially everyone has some business on the side of their regular job. As you can imagine, this creates an awful lot of background noise that serious entrepreneurs have to deal with. It effectively lowers the standards for starting and operating a business. On the other hand, it creates an environment where trying new ideas is affordable.
Now let's look at Belgium. Starting a business is a very serious thing requiring strong commitment. When you hear about someone who made the leap, it makes a strong statement: he's not just trying some idea on his spare time, he's in business.
Both systems have flaws. But as a customer, who would you prefer doing business with, the guy who's trying something on the side, or the guy who's putting his balls in it?
And when you start a business in Canada, do you have any idea how much time and energy it takes to cut though the crowd of small-time "businesspeople" who are carpet-bombing your customers with their cheap business cards?
In conclusion, barriers to entry are good, on the condition that they:
- Encourage committed entrepreneurs
- Deter uncommitted entrepreneurs
- Are based on relevant barriers (and not large amount of startup capital).