"These voters that are actually participating in the elections are from a much higher income, older, whiter segment of the California electorate," he says. "And they are voting on the elected officials and ballot measures that are going to be affecting all Californians."
Mitchell and others have been closely sifting through the results of the June and November elections, each of which registered historic new lows in overall voter turnout for primary and general elections in California.
Wanted: Young Voters
And most glaring in the research, it seems, is the issue of age. Young voters were almost nowhere to be found: only 8.2 percent of Californians age 18-24 cast a ballot in November.
It was Romero and her team who sifted through the recently completed reports from the secretary of state's office in search of a clear sense of the age of the electorate.
What they found was that even Californians in their mid-30s and well into adulthood were virtually nonexistent in the 2014 political season.
But it was the youngest voters who really took a pass on participating. Consider the observation of data expert Mitchell, who counted up the raw numbers of ballots they cast.
"In California," he said, "an 18- or 19-year-old was more likely to be arrested this year than actually vote in one of the statewide elections."
Part of the problem, says UC Davis' Romero, is that young voters know the least about the system of voting -- from deadlines to register, to request a ballot by mail, and more.
"People say that youth don't vote," says Romero. "Well, they're not being outreached to, and they're not being pulled into the political process."
Wanted: Latino Voters
Other subsets of voters, while not missing to that extent, also were underrepresented in the almost 12 million ballots cast in 2014. Most notably, perhaps, may be Latino voters.
"Right now, we're talking about Latinos being the largest ethnic group in the state," says voter data expert Mitchell. "They're not yet the largest ethnic group in the registered voters. And they're far from the largest ethnic group in people that actually vote."
Mitchell's analysis found that only 28 percent of registered Latino voters showed up last November in California -- compared with 37 percent turnout of registered Asian-Americans, 32 percent of registered African-Americans and 49 percent of white voters.
Candidates and ballot measure strategists increasingly measure their chances of victory based on the pool of likely voters, those who have shown a tendency to show up for elections in years past.
But it's possible that such an outreach system becomes a self-fulfilling prophecy.
"Youth get very little contact, real contact, from candidates and campaigns," says Romero of UC Davis. "And so it generates even less information, less awareness, less connection with the political process."
And those young Californians, as well as those from the state's diverse communities, will one day become the older adults. And without the experience of -- or sense of importance about -- voting, the long-term trend could be toward more, not fewer, tepid elections.
Note: an earlier version of this story mistakenly said the low turnout among young Californians was a percentage of registered voters, when it was actually among all Californians of that age.