I’m not endorsing Bloomberg. I think it’s a mistake for journalists, even opinion journalists, to endorse, and I’d be fine with many of the candidates. But I just want to throw Bloomberg’s record before you:

Education: As mayor, Bloomberg took over a dysfunctional school system and instituted a series of fantastically successful reforms. When he became mayor, less than half of New York students were graduating from high school on time. When he left, nearly two-thirds did so within four years. He replaced large failing schools with small attentive schools. The graduation rates in those places surged from 38 percent to 68 percent. Under Bloomberg test scores rose more quickly than in other cities. The black-white achievement gap decreased by 23 percent.

Job creation: Bloomberg inherited a city reeling from the Sept. 11 attacks and helped kick-start an economic boom. He inherited a city that was economically over-reliant on Wall Street and had a relatively tiny tech sector. Now New York receives the second-highest amount of tech investment, after Silicon Valley. He led the effort to create an applied sciences university on Roosevelt Island that will supply the city with talent for generations. Private sector jobs increased by 10 percent during the last four years of his term alone. The mayor’s office said that 29,000 people found jobs through the city’s career centers in 2012, compared with 500 people in 2004.

Housing: Bloomberg rezoned about 40 percent of New York City and helped spark a neighborhood renaissance along just about every waterway in the city. He led a $2.4 billion expansion of the subway system to serve the new Hudson Yards neighborhood. He managed to finance 170,000 new affordable housing units, even while the state and federal governments slashed housing budgets.

Health and the environment: He banned artificial trans fats and smoking from bars and restaurants. New York experienced about a 30 percent decline in adult smoking over his tenure. Meanwhile his administration added more than 850 acres of parkland, reduced greenhouse-gas emissions in city-owned buildings and created a bike-share program. Life expectancy in New York is now 81.2 years, more than two years longer than the national average.