Published online by Cambridge University Press: 05 July 2014
Introduction
Those who generate data – for example, official statistics agencies, survey organizations, and principal investigators, henceforth all called agencies – have a long history of providing access to their data to researchers, policy analysts, decision makers, and the general public. At the same time, these agencies are obligated ethically and often legally to protect the confidentiality of data subjects’ identities and sensitive attributes. Simply stripping names, exact addresses, and other direct identifiers typically does not suffice to protect confidentiality. When the released data include variables that are readily available in external files, such as demographic characteristics or employment histories, ill-intentioned users – henceforth called intruders – may be able to link records in the released data to records in external files, thereby compromising the agency’s promise of confidentiality to those who provided the data.
In response to this threat, agencies have developed an impressive variety of strategies for reducing the risks of unintended disclosures, ranging from restricting data access to altering data before release. Strategies that fall into the latter category are known as statistical disclosure limitation (SDL) techniques. Most SDL techniques have been developed for data derived from probability surveys or censuses. Even in complete form, these data would not typically be thought of as big data, with respect to scale (numbers of cases and attributes), complexity of attribute types, or structure: most datasets are released, if not actually structured, as flat files.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.