The Hawkeyes have won 24 national championships overall
They have 3, in '96, '06 and '08
The Kansas Jayhawks have never been selected as a national champion in college football.
By the team's overall win-loss record.
UCLA has recently celebrated the "First to 100" national titles. So, at least for right now, UCLA has won the most national titles overall.
The Green Bay Packers have the most Championships with thirteen overall (9 NFL Championships, 4 Super Bowls). The Packers are also the only team to win three consecutive Championships, having done so twice (1929-1931,1965-1967).
The economic study of individual actions (and individual organizations actions) is Microeconomics. Macroeconomics is the branch of economics that studies the overall working of a national economy. While individual actions do affect the national economy, in general only large groups of individuals cn affect a national economy.
By winning its division and then winning the two league playoff championships. There are four teams from each league that go to the playoffs, three division winners and one wildcard team. The usual seeding is the division winner with the best season record plays the wildcard team and the two other division winners play each other. However, if the team with the best overall record and the wildcard team come from the same division then the wildcard team will play the division winner with the second best overall record and the division winner with the best overall record will play the other division winner. The winners of those two seven game series then play another seven game series with the winner advancing to the World Series.
Not as many as North Carolina