We document systematic and significant time variation in US lifecycle non-durable consumption profiles. Consumption profiles have consistently become flatter: differences in consumption across generations have decreased. Pooling data across different periods to identify lifecycle profiles masks relevant time variations and may artificially generate hump-shaped consumption age profiles. The main driver behind lifecycle consumption variations are lifecycle income changes, which display similar flattening. Employing a lifecycle model we show changes in income are sufficient to match the movements in consumption. The contributions of credit, housing and interest rates changes are quantitatively small. JEL-Codes: E210, J110.

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