The real test of any mayor is how well the city works. In his eight years in office, Mayor Michael Bloomberg has managed to make the unpredictable city of New York work astonishingly well.

Mr. Bloomberg has been a first-rate steady hand during unsteady times. He guided the city out of the post-9/11 recession, then tucked away money during the boom years that followed. That foresight has helped New Yorkers weather one of the worst economic downturns in 80 years. Mayor Bloomberg has easily earned another four years.

The Democratic nominee, Comptroller William Thompson, is a worthy opponent. Mr. Thompson has been a competent comptroller in a turbulent period and is a quiet, conciliatory man. But he has spent too much of his campaign attacking Mayor Bloomberg rather than explaining how he would manage the city, and Mr. Bloomberg is simply the stronger candidate.

What makes the mayor stand out is not his political skill, although he has come a long way since his first clumsy days in office. He has run the $60 billion government with a keen attention to accountability and efficiency. He has chosen some of the best people in the country to work for him, and he has mostly let them do their jobs. As a result, many city services operate better than they have for years. The garbage mostly disappears on time. The police and fire departments respond quickly. Mr. Bloomberg’s 311 phone line allows New Yorkers to complain to a live human being. Often, they even see tangible results.