Here's why Americans having fewer kids won't doom the economy

• America's falling population isn't necessarily bad for the economy, Fisher Investments said.
• The US birth rate just fell to its lowest level in over 40 years, according to provisional CDC data.
• But consequences could be offset by technological advancements and time, the investment firm said.

Americans aren't having nearly as many kids as they used to, but that won't be the blow to the US economy that many have feared, according to Fisher Investments.