Work with interactive mapping tools from across the Census Bureau.
Read briefs and reports from Census Bureau experts.
Watch Census Bureau vignettes, testimonials, and video files.
Read research analyses from Census Bureau experts.
Developer portal to access services and documentation for the Census Bureau's APIs.
Explore Census Bureau data on your mobile device with interactive tools.
Find a multitude of DVDs, CDs and publications in print by topic.
These external sites provide more data.
Download extraction tools to help you get the in-depth data you need.
Explore Census data with interactive visualizations covering a broad range of topics.
Information about the U.S. Census Bureau.
Information about what we do at the U.S. Census Bureau.
Learn about other opportunities to collaborate with us.
Explore the rich historical background of an organization with roots almost as old as the nation.
Explore prospective positions available at the U.S. Census Bureau.
Information about the current field vacancies available at the U.S. Census Bureau Regional Offices.
Discover the latest in Census Bureau data releases, reports, and events.
The Census Bureau's Director writes on how we measure America's people, places and economy.
Find interesting and quirky statistics regarding national celebrations and major events.
Find media toolkits, advisories, and all the latest Census news.
See what's coming up in releases and reports.
We present two types of diagnostics for SEATS and similar programs. We start with modifications of the diagnostic used by SEATS to detect underestimation or overestimation, meaning inadequate or excessive supression of frequency components near the target frequencies, e.g. the seasonal frequencies in the case of seasonal adjustment. The modifications use time-varying variances of the finite-length filter output instead of the constant variance associated with the infinite-length filter. The SEATS diagnostic is shown to be substantially biased toward indicating underestimation even when the estimation is optimal, a situation where the modified diagnostics are unbiased. The second type of diagnostic considered is an adaptation of the widely used sliding spans diagnostic of X-12-ARIMA. The adaptation is a method for determining the span length appropriate for model-based-adjustment as a function of the ARIMA model's seasonal moving average parameter.
Residual seasonality, spectrum, SEATS, underestimation, overestimation, sliding spans
This symbol indicates a link to a non-government web site. Our linking to these sites does not constitute an endorsement of any products, services or the information found on them. Once you link to another site you are subject to the policies of the new site.