An “economic blackout” promoted on social media is underway but with no clear indication of how many people took part or whether retail companies and restaurants will notice any effect from the grassroots protest.

Many consumers are planning to refrain from spending money today during a one-day economic blackout. Here's what to know in Missouri.

Historically, they have lead to social justice reforms, such as the sugar boycott by British abolitionists in the late 18th century helped raise awareness and put economic pressure on the sugar industry produced by enslaved people.