Cox’s Proportional Hazard Modelling

[Question]

Hi All,

I would like to build a model to predict likelihood for an individual customer to return by week n etc..

I have hear Cox’s Proportional Hazard technique would be the appropriate technique. But I have never used it and your help would be mucch appreciated. Also how do I define my target in this case?...My data is like below.

Many Thanks

customer_id	W1	W2	W3	W4	W5	W6	W7	W8	W9	W10	W11	W12	W13
100	.	.	.	.	.	.	2.5	.	.	2.5	2.5	.	.
101	4.5	2	3.5	2.5	2.5	2.5	.	.	4.5	5	.	.	.
102	.	6.5	.	.	.	.	.	.	6.5	.	.	9	.
103	.	5	10	.	.	.	9	8.5	13	.	7	18	7
104	2	2	.	.	.	.	.	.	2	.	4.5	2	.

[Reeza]

What does your data represent? 

Also, please post a better formatted dataset, ideally as a data step. 

[Question]

Hi Reeza,

The data represents the weekly customer transactions they have made in the last 13 weeks...the objective is to build survival model..When are customers more likely to return and purchase...For example, we are expecting the customer 101 to return on w9 etc..?

Hope It makes sense, if not please do not hesitate to give me a shout.

Thank You

customer_id	W1	W2	W3	W4	W5	W6	W7	W8	W9	W10	W11	W12	W13
100	.	.	.	.	.	.	2.5	.	.	2.5	2.5	.	.
101	4.5	2	3.5	2.5	2.5	2.5	.	.	4.5	5	.	.	.
102	.	6.5	.	.	.	.	.	.	6.5	.	.	9	.
103	.	5	10	.	.	.	9	8.5	13	.	7	18	7
104	2	2	.	.	.	.	.	.	2	.	4.5	2	.

[Question]

Hi Reeza,

The data represents the weekly customer transactions they have made in the last 13 weeks...the objective is to build survival model..When are customers more likely to return and purchase...For example, we are expecting the customer 101 to return on w9 etc..?

Hope It makes sense, if not please do not hesitate to give me a shout.

Thank You

customer_id	W1	W2	W3	W4	W5	W6	W7	W8	W9	W10	W11	W12	W13
100	.	.	.	.	.	.	2.5	.	.	2.5	2.5	.	.
101	4.5	2	3.5	2.5	2.5	2.5	.	.	4.5	5	.	.	.
102	.	6.5	.	.	.	.	.	.	6.5	.	.	9	.
103	.	5	10	.	.	.	9	8.5	13	.	7	18	7
104	2	2	.	.	.	.	.	.	2	.	4.5	2	.

[Question]

Hello,

Could anyone please respond to my message. I would be grateful..

Thank You

[WendyCzika]

I'm not clear where you are trying to do this, but if you are programming in SAS, you might try the SAS Statistical Procedures community for help since the PHREG procedure is a STAT procedure.