On February 16 and 17th, the Economist is hosting a conference called “Intelligent Infrastructure: The Architecture of Progress“ in New York City. Once per day today and tomorrow, we’ll give free admission (a $1,595 value) to one lucky reader. All you have to do is use the hashtag #ideaseconomy and tell us your idea @NextAmCity“>@NextAmCity about how to deal with the population doubling in the next 30 years.

Here’s the conference’s overview: Over the next 30 years the global population will nearly double, from 6 billion to almost 12 billion people. Every country in the world has massive infrastructure challenges ahead of it. Together, we can find smart solutions. Intelligent Infrastructure will convene the world’s top minds for captivating discussions on energy, architecture, information, transportation, finance, and cities of the future.

The conference will be held at Pace University’s Downtown campus in New York City.