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To conduct the analysis of these changes, the first requirement is an indicator of the length of a benefit or unemployment duration. I present results below from the analysis of two principal measures: the duration of UI/EI claims, and the duration of unemployment or joblessness, whether or not this latter duration is accompanied (in part or whole) by a period of UI/EI benefit receipt.

To understand the relationship between these two main indicators, one should understand that some durations of unemployment may not be long enough to warrant the filing of a UI/EI claim, as some earlier work with the Canadian Displaced Worker Survey has indirectly suggested (Storer and Van Audenrode 1993, e.g.). There may also be other reasons why eligible persons do not make benefit claims. Other durations may also be uninsured if the applicant lacked eligibility (e.g., if classified as an unjustified voluntary quit, or if lacking sufficient weeks/hours of qualifying employment). Some claims may have a phase of benefit collection followed by a jobless period when UI/EI benefit eligibility is exhausted. While the benefit collection period will be determined from the administrative records alone, the jobless period will be determined as starting following the Record of Employment (ROE) date (assuming the individual is jobless following this separation) and ending at the date of starting work at the next job.