CALIFORNIA HEALTH CARE FOUNDATION 40
FOR MORE INFORMATION
California Health Care Foundation
1438 Webster Street, Suite 400
Oakland, CA 94612
510.238.1040
www.chcf.org
California Employer Health Benefits
ABOUT THIS SERIES
The California Health Care Almanac is an online
clearinghouse for data and analysis examining
the state’s health care system. It focuses on issues
of quality, affordability, insurance coverage and
the uninsured, and the financial health of the
system with the goal of supporting thoughtful
planning and effective decisionmaking. Learn
more at www.chcf.org/almanac.
AUTHORS
Heidi Whitmore, Principal Research Scientist
Jennifer Satorius, Senior Research Scientist
NORC at the University of Chicago
The California Employer Health Benefits Survey is a joint product of the California Health Care Foundation (CHCF) and NORC at the University of
Chicago. The survey was designed and analyzed by researchers at NORC, and administered by Davis Research (Davis). The findings are based on
a random sample of 454 interviews with employee benefit managers in private firms in California. Davis conducted interviews from August to
December 2020. The sample of firms was drawn from a Dynata database of private employers with three or more workers. Some exhibits do not sum
to 100% due to rounding effects.
KFF (Kaiser Family Foundation) sponsored this survey of California employers from 2000 to 2003. A similar employer survey was also conducted in
1999 in California, in conjunction with the Center for Health and Public Policy Studies at the University of California, Berkeley. The Health Research
and Educational Trust (HRET) collaborated on these surveys from 1999 to 2004. The Center for Studying Health System Change collaborated on these
surveys from 2005 to 2006.
This survey instrument is similar to a national employer survey conducted annually by KFF. The US results in this study are either from the published
reports or from author calculations from the surveys’ public use files. A full analysis of the US data set is available on KFF’s website at www.kff.org. Both
the California and US surveys asked questions about health maintenance organizations (HMOs), preferred provider organizations (PPOs), point-of-
service (POS) plans, and high-deductible health plans with a savings option (HDHP/SO). Conventional (fee-for-service) plans are generally excluded
from the plan type analyses because they compose such a small share of the California market.
Many variables with missing information were identified as needing complete information within the database. To control for item nonresponse bias,
missing values within these variables were imputed using a hot-deck approach. Calculation of the weights follows a common approach. First, the
basic weight is determined, followed by a survey nonresponse adjustment. Next, the weights are trimmed in order to reduce the influence of weight
outliers. Finally, a post-stratification adjustment is applied.
All statistical tests in this chart pack compare either changes over time, a plan-specific estimate with an overall estimate, or subcategories versus all
other firms (e.g., firms with three to nine workers vs. all other firms). Tests include t-tests and chi-square tests and significance was determined at p <
.05 level.
A important note about the methodology. Rates of change for total premiums, for worker or employer contributions to premiums, and other
variables calculated by comparing dollar values in this report to data reported in past CHCF or KFF publications should be used with caution, due to
both the survey’s sampling design and the way in which plan information is collected. Rates calculated in this fashion not only reflect a change in the
dollar values but also a change in enrollment distribution, thus creating a variable enrollment estimate. However, rates of change in premiums are
collected directly as a question in the California survey. This rate of change holds enrollment constant between the current year and the previous year
thus creating a fixed enrollment estimate. Because the survey does not collect information on the rate of change in other variables, additional rates
are not reported. The national survey conducted by Kaiser/HRET, however, stopped collecting directly rates of change in premiums in its 2008 survey.
Therefore, the rate of change in total premiums in the US provided in this report uses a variable enrollment estimate.
Please note that due to a change in the post-stratification methods applied in 2003, the survey data published in this chart book may vary slightly
from reports published prior to 2003.
Methods