Sequential Recommendation on Amazon Reviews 8 Domains

89.4NDCG@10 (Avg)MergeRec (Domain-wise)

Evaluation Results

Method
MergeRec (Domain-wise)2026.01	89.4	96.27	84.65	80.68	78.21	94.07	98.97	88.13	90.48
MergeRec (Layer-wise)2026.01	88.62	93.4	85.08	78.27	77.58	94.8	99.58	89.95	90.66
TIES2026.01	87.64	94.09	81.66	80.6	82.07	92.36	96.49	83.51	76.81
MergeRec (Layer-wise)2026.01	86.65	87.64	88.94	79.21	74.91	91.43	104.19	87.27	79.87
MergeRec (Domain-wise)2026.01	86.07	87.31	76.54	79.14	76.87	94.5	100.48	80.36	84.97
Weight Averaging2026.01	85.84	86.37	81.64	76.44	74.6	94.63	98.7	91.35	88.87
TIES2026.01	85.74	85.71	87.92	76.38	83.56	89.96	97.93	90.85	72.04
Task Arithmetic2026.01	85.7	93.6	80	77.58	77.38	91.6	94.56	81.75	77.75
TIES2026.01	85.6	87.16	79.61	76.52	81.25	91.95	97.59	80.72	80.11
MergeRec (Layer-wise)2026.01	85.37	86.18	77.32	77.77	75.39	93.82	101	81.55	83.87
MergeRec (Domain-wise)2026.01	84.46	86.73	85.69	78.68	72.36	87.45	100.83	86.61	77.22
Task Arithmetic2026.01	84.08	86.47	75.99	76.05	76.37	91.85	99.52	78.08	75.53
Weight Averaging2026.01	83.15	82.88	76.42	75.67	70.29	92.37	99.68	82.7	86.2
Joint Learning2026.01	81.67	81	80.58	85.57	75.84	92.12	71.85	85.25	97.07
Weight Averaging2026.01	81.5	83.19	83.57	71.84	67.74	90.68	98.42	84.7	76.31
MergeRec (Layer-wise)2026.01	79.18	81.23	84.3	66.94	70.26	81.88	93.35	81.73	77.47
Joint Learning2026.01	78.48	79.94	97.16	79.19	67.59	88.03	68	92.07	92.08
MergeRec (Domain-wise)2026.01	78.3	81.33	81.78	65.59	70.51	78.22	92.14	79.46	78.36
Weight Averaging2026.01	78.13	78.59	85.53	67.01	64.7	85.65	94.62	82.03	75.85
Joint Learning2026.01	75.76	72.09	75.48	66.5	66.67	86.94	87.67	85.34	78.6
TIES2026.01	74.72	72.17	73.04	65.61	78.62	71.78	82.47	81.81	73.44
Joint Learning2026.01	73.05	67.41	75.48	76.13	66.69	82.75	72.12	69.55	87.62
Task Arithmetic2026.01	73	73.33	77.37	57.23	66.13	81.75	89.62	75.4	65.31
AdaMerging (Domain-wise)2026.01	71.17	75.47	55.19	60.35	56.45	71.09	90.67	67.83	87.15
AdaMerging (Layer-wise)2026.01	70.67	74.1	69.21	66.94	54.57	80.67	79.05	70.79	77.29
Zero-shot2026.01	67.52	63.59	61.57	55.88	52.63	69.33	92.79	70.75	81.44
AdaMerging (Domain-wise)2026.01	67.29	77	56.84	61.87	56.92	55.66	82.95	56.31	69.72
AdaMerging (Layer-wise)2026.01	64.96	71.01	51.7	53.68	54.66	62.19	81.38	69.86	69.99
AdaMerging (Layer-wise)2026.01	61.61	60.94	32.01	52.35	51.36	64.14	82.6	64.32	79.22
AdaMerging (Domain-wise)2026.01	60.21	68.38	58.18	57.61	42.43	56.16	72.01	75.84	62.5
AdaMerging (Layer-wise)2026.01	57.91	56.9	56.93	53.6	44.83	49.51	77.66	69.2	65.29
Task Arithmetic2026.01	55.37	50.11	51.82	55.54	52.3	58.8	66.56	49.09	51.86
Zero-shot2026.01	53.55	65.05	50.33	34.05	31.26	40.96	82.63	61.27	63.58
AdaMerging (Domain-wise)2026.01	50.28	51.53	49.02	41.46	35.38	43.17	66.06	68.61	69.18
Zero-shot2026.01	33.06	32.86	33.22	23.98	20.8	40.87	45.76	34.05	40.78
Zero-shot2026.01	26.85	27.51	27.83	18.08	14.22	41.96	32.15	28.46	38.78